Report of the Eclipse Expedition to Caroline Island, May 1883. (1884)

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44 MEMOIRS OP T H E NATIONAL A C A D E M Y O F SCIENCES. RAINFALL. In order to measure approximately the rainfall a gauge was improvised with the aid of a tin can of uniform diameter. The frequent showers gave in general an inappreciable amount of rain, though some of them gave small amounts, one-tenth of an inch or over. The meteorological summary gives the record of the rainfall, from which it will be seen that the total amount dui-mg the two weeks was about 8 inches. More than half of this fell in the rain-storm of May 4, when I t rained hard and steadily from midnight to 9.50 a. m. WIND. The observations of the direction and velocity of the wind give some interesting results. The former was almost always noted as east or northeast, and was at no time observed to be from any other quarter than between north and east. The island is situated in the region of the southeast trades, which makes it noteworthy that not a single record gives a direction south of east. The table of wind velocities on page — gives m detail the results of the anemometrical obser- vations. From this it will be seen that there is no indication suflSciently marked of any diurnal change in the wind's velocity. It is, however, apparent that there was a decrease of velocity from the beginning of the senes to May 2, and an increase to May 7. These dates follow the dates of minimum and maximum pressure mentioned above by an interval of about two days, but the series is for too short a period of time to warrant the drawing of any inferences as to their relation. Indeed, it may be said that the indications of periodicity in both these cases may be only acci- dental, and not real indications of a progressi ve movement. I t would take a longer continued series of observations to decide the question, and therefore the above areraintioned as only possibilities which these observations suggest. The average hourly velocity of the wind was 6.05 miles; the largest total movement in twenty- four hours was 212.3 miles, from 7 a.ra.May 7 to 7 a. m. May 8 ; the least 59.2, between the same hours May 4 and 6. The highest velocity observed was on April 3 0 , during the passage of a squall which was characterized by wind without rain. A t 12.35 p. m. the anemometer registered 1 mile in 3™ 40', the equivalent of 1 0 miles an hour. The wind usually increased during the pas- sage of the heavier showers. METEOROLOGICAL OBSERVATIONS BETWEEN APRIL 25 AND MAY 9, 1881 The observations given below were made with the following instruments: Aneroid barometer, H O T T I N G E R , 3241. Dry-bulb thermometer. G R E E N , 799, stem graduated. Wet-bulb thermometer, G R E E N , 797, stem graduated. Maximum thermometer. G R E E N , 725, stem giaduated. Minimum thermometer. G R E E N , 710, stem graduated. Minimum thermometer for use at ground, H i O K S , 5521, stem graduated. R O B I N S O N ' S anemometer. G R E E N , 111. The readings of these instruments are given exactly as recorded, with the following exceptions: The readings of the maximum thermometer have been corrected by the amount— 0^.5, deter- mined by thirty-seven compansons with the dry bulb made April 2 7 - 3 0 , The readings of the minimum thermometer, G H E E N , 710, have been corrected by the value. + 0O.4, determined by sixty^two similar comparisons; those of the minimum thermometer, H i O K S , 5521, by + 2O.0, determined by forty similar comparisons. The large correction to the latter was due to a bubble in the instrument, which was several times removed, but as often formed again. 

S O L A E E C L I P S E , M A Y 6, 1883. 45 The readings of the aneroid barometer have been reduced by applying the corrections for instrumental error, temperature, and elevation. These have been obtained as follows: REDUCTION OF OBSERVATIONS MADE W I T H ANEROID BAROMETER, HOTTINGER, 3241. Comparisons between aneroid barometer, H O T T I N G E R , 3241, and mercurial barometer, G R E E N , 1930. Readings corrected 3241 1936 for temperature C orrec- Date Hour. tiou to 3241 t Readiug. t Reading 3241 1936 c tn. o tn Ml tn tn. April 25 10 40 a Di. 85 29 927 91 4 30 123 29.84 29.96 + 0 12 27 7 00 a m 83 927 81 7 031 85 89 .04 27 2.00 p in 85 827 92.0 .037 .74 86 12 27 9 00 p. m 84 .873 81 2 .032 .79 89 .10 28 2 30 p. m 86 .778 98.7 002 69 82 .13 28 9 00 p u 83 876 82 4 .038 80 89 09 •iO 9.00 p m 84 .873 81 7 .038 .79 90 11 May 1 11 00 a. m 85 875 95.6 080 .79 90 11 6 » 00 a m 83 949 86 1 120 87 97 10 6 9 00 p Di 83 922 81 7 .081 84 .94 10 7 6 00 p m 84 .813 81 7 020 .73 88 15 7 9 0 0 p ni 83 887 81 2 .046 .81 .90 09 8 7 00 a m 81 .870 80 8 .025 80 .89 .09 + 0 104 Temperature corrections to barometer, H O T T I N G E R , 3241. [Furnished by maker.] t. Corr. o tn. 76 — 0. OG 80 — 0. 07 84 — 0. 0 8 5 88 — 0,10 92 — 0.11 Elevation of instrument above sea level, 10 feet. Reduction to sea-level, + 0.01 inch. Combining these reductions we have the following table by which the barometer readings in the column "Eeduced reading" are obtained from the observed readings: t. lieduction. o m. 70 + 0,054 80 .044 84 ,029 88 .014 92 + 0.004 

46 MEMOIRS O F T H E NATIONAL A C A D E M Y O F SCIENCES. Comparisons between dry bulb thermometers, G R E E N , 799, placed m the instrument shelter, and G R E E N , 811, read after being stcung rapidly through the air. [These compariHOus weie made on different days between April 2 5 .lud May 2 T h e swinging of G U E F N , 811, w a s repeated several limes until it seeiiiud certain that it had assumed its true reading T h e dilterenccsoiily between the readings are given T h e lustrniiieutal curiectiuiis to both of these thermometers are 0 0 ] 811—799. I Before extra roof II After extra roof III D u r i n g a period was placed upon was placed upon of calm, May 2 shelter shelter +o — 0 +0 — 0 +0 — 0 0 6 0H 0 0 0 4 0 5 0 7 ;? { 6 1 3 a 1 2 3 8 0 1 0 0 2 1 0 8 2 1 4 3 0 + 0 r> — 1 9 0 6 0 Sum — 1<- 4 2 Me.iii — 0 ° 3 4 2 17 1 9 4 0 1 2 2 0 — 1 1 G — 81 + 009 Sum —6° 6 + 0-^ 1 Mean-003 If we assume, as is usual, tbat the whirled thermouieter gives a close approximation to tbe true air temperature, tbe above comparison sbows what correction should be applied to tbe ther mometer in the instrument shelter. I t will be seen that the effect of placing a double roof upon tbe shelter was to dmiinibb this correction, the correction becomrag almost inappreciable except in the extreme case on May 2 , when there was no wind and the air was accordingly stagnant in the shelter. A s a result of these comparisons, it was decided to adopt the readings of the dry-bulb thermometer within tbe shelter without any coriection for the air temperature. A P R I L 2 5 , 1883 Anemometer Barometer Thermometer Rel hnm Weather Clouds Wind Observed Reduced Hour t Dry Wet reading reading A M 6 00 79 0 76 3 88 . - - NE Clear 2 cum in horizon 7 00 82 29 916 29 95 81 9 78 0 82 . - - NE Clear 2 cum in horizon 8 00 83 934 97 84 5 79 2 78 . . - NE Clear 1 cum in horizon. 9 00 84 942 97 86 3 81 7 79 . . - NE Clear 1 cum 10.00 H4 945 .97 86 5 79.7 71 . . . NE Clear 2 cum - 11 00 87 897 .92 86 2 80 8 76 - . . NE Clear 2 cum 12 00 85 .900 93 86 0 71 6 74 - - - NE Clear 1 cnm F M . . - NE 85 .877 .90 87 5 80 2 71 Clear 2 cnm 1 00 2.00 86 848 87 87.5 80 2 71 . . - NE Clear 1 cum 3 00 86 .838 86 86 0 80 0 75 - . . E Clear 1 cnm 4 00 85 847 .87 84 9 79 2 74 - . - NE Clear 2 cum 5 00 85 .863 .89 83 7 78 7 81 237.0 NE Clear 2 cum 6 00 85 .868 .89 82 7 78 0 78 246 3 NE Cloudy 8 cum. and str 9 00 84 935 .96 82 2 77 8 82 266 9 NE Cleir 1 cum. Mtscellaneous —Minimum, 78 2 . Minimum at ground, 76 6 Maximum, 88 2 6 00 a. m Double rainbow i n the west 8 30 p m Zodiacal light plainly seen in the west, but w i t h limits i l l defined I t extended about 3 0 ° in altitude, 60° in azimuth 9.10 p. m Moon made shadow bands through the tlouds above it, similar to those frequently made by the sun. 

S O L A R E C L I P S E , M A Y 6, 1883. 47 A P R I L 26, 18ti3 Anemometer. Barometer Thermometer Rel hum Weather Clouds Observed Reduced Honr t Dry Wet a reading reading A M 7 00 8} 29 955 29 99 82 8 77 8 80 3»1 9 NE Fair 3 cnni 8 00 81 945 9^ 85 0 79 8 80 339 0 NE ClLar 2 cum 9 00 84 960 .99 83 0 77 7 77 347 4 NE Clcir i UIIIII 10 00 84 96'1 99 86 0 79 7 74 .552 6 NE Fair 4 ciiin 11 00 84 932 96 87 2 79 7 70 360 i NE Fair 3 ciiiii 12 00 84 902 93 87 2 79 8 70 367 2 NE Fair 3 cuni P M 1 00 84 877 91 86 2 78 7 70 374 8 NE Clear 1 cum 2 00 85 858 88 85 8 78 6 73 382 4 NE Fair 3 cum 3 00 85 848 87 a5 8 78 8 75 389 3 NE Fair 3 cum - 4 00 85 855 88 84 9 79 0 74 ,}9! 6 NE Fair 4 cum ,1 00 84 872 90 8) 9 7t .{ 77 3Ub 3 NE Fair 3 cum b 00 84 883 91 8.! 2 77 2 79 402 2 NE Fair 5 cum 7 00 84 9i5 95 75 5 7} 5 89 408 1 NE Raiu 10 mm 8 00 82 945 98 78 0 77 8 100 410 i NE Cloudy 9 cum 9 00 82 944 98 79 2 76 3 88 418 1 NE Cloudy 10 str MtseeUaneous —Minimum, 80 6 at 7 00 a lu , 75 1 at 9 00 p m Minimum at ground, 81 1 Maximum, 87 8 L i g h t showers at 10 05 a m , 2 15, 4 05 p m Heavy showers in the evening after 6 30 p m Rainfall, 0 3 A P R I L 27, 1883 Anemometer Barometer I'liernioineter Rel. hum Weather Clouds Wind Observed Reduced Honr t Dry Wet reading reading - A M 6 00 81 29 913 29 95 81 0 76 8 82 476 0 NE Fair 2 cum , 2 c i r str a n d c i r cum 7 00 8i 927 96 82 0 77 2 80 484 4 NE Fair 2 cum , 2 c i r str ami cir cum 8 00 83 940 97 78 8 75 9 89 494 5 E Ram 9 cniii 9 00 83 947 98 84 6 79 2 78 502 1 NE Fair 3 cum , heavy mm in noitl) 10 00 83 935 97 84 5 79 2 81 511 8 NE Fair 4 cum 11 00 83 914 95 85 2 79 4 74 519 4 NE. Fair 3 cum and cir str 12 00 84 887 92 87 2 80 9 74 525 8 E Fair 3 cum and cir str P M 1 00 84 850 88 86 2 79 2 72 532 7 E Fair 3 cum and cir str 2 00 85 827 &5 86 7 79 7 71 539 0 £ Clear 2 cum and cir str 3 00 85 810 ,83 85 0 78 2 72 544 7 E Fair 3 cum and cir str 4 00 85 812 84 84 3 78 2 75 549 9 NE Fair 3 cum and cir str 5 00 85 822 85 82 't 77 7 77 555 0 NE Fair 3 cum and cir str 6 00 85 829 85 8i 0 77 6 82 5.59.6 NE Fair 4 cum and cir str 7 00 84 861 89 81 8 77 4 81 564 3 NE Clear 1 cum in horizon 8 00 84 869 90 81 8 76 6 80 568 9 NE Clear 1 cnm 9 00 84 873. 90 81 6 77 0 80 575 3 NE Clear 1 cnm Miscellaneous—Minimum, 78 1 Maximum, 88 3 Shower, 7 40-8 0 0 a ra , inappreciable 7 30 p m , zodiacal light seen—an arch in west, 2,5° high and 40° broad, with limits poorly defined. 

48 MEMOIES O F T H E NATIONAL ACADEMY O F SCIENCES. A P R I L 28,188.^. Barometer Thermometer « c § u ss o o Clonda Weatl Rel h a Wind Observed Reduced Hour t Dry Wet reading reading o a -<1 A M 6 00 82 29.879 29 91 80 8 76 7 83 627 1 E Clear 2 cnm and c i r str 7 00 82 895 93 79 9 76 3 85 632 1 E Fair 4 cum 8 00 82 912 95 83 0 78 5 80 636 6 E Fair 3 cum 9 00 82 913 95 85 0 78 8 e2 643 8 E. Clear 2 cum in north 10 00 83 90i 9{ 85 0 80 0 80 650 '1 NE. Clear 1 cum and cir str 10 35 83 .887 92 85 9 79 0 72 . . . E Clear 1 cir str 11 00 84 877 91 86 78 7 67 654 9 NE Clear 1 cir str 11 30 84 862 .89 86 8 79 7 69 656 8 NE. Clear 1 cum in horizon 12 00 84 839 87 87 2 80 2 72 658 5 NE Clear 1 cum in horizon P M 12 30 84 832 8b 87 8 81 0 73 660 2 E Clear 2 cum 1 00 84 .820 85 87 0 80 1 72 661 4 E Clear 2 cum 1 30 8S> 805 .8i 87 0 30 7 75 663 1 NE Clear 2 cnm. 2 00 85 798 82 87 3 80 3 71 6b4 2 NE. Fair 4 cnm 2 30 86 778 80 86.0 79 0 72 666 7 E. Fair 4 cum. 3 00 86 777 80 87 0 80 1 72 669 9 E Fair 4 cum. 3 30 8b 775 80 85 2 78 0 72 672 2 E Clear 2 cum 4 00 86 779 80 85 5 78 0 71 675 4 E Clear 1 cnm 4 30 86 788 81 84.0 77.8 74 678 2 E Clear. 1 cum 5 00 85 800 83 83 2 77 2 74 681 6 E Clear 2 cum. 6.00 85 .815 .84 82 4 77.2 79 687 4 E Fair 3 cnm 9 00 83 876 .91 82 0 77 3 80 708 9 E. Clear. 1 cum MiacellaneoM —Minimum, 79 2 Minimum at ground, 79 5 Maximum, 89 3 Shower about 10 p m , giving 0 02 inch of rain by estimation 6.30 a m , ftno alternate dark a n d light streaks extending completely across the s k y through the zenith f sun behind heavy cumuli A P R I L 29,1883 Anemometer Barometer. Thermometer Weather. Rel hum Clouds. Wind Observed Reduced Hour t Dry Wet reading reading A M 6 30 83 29 862 29 89 81 4 76 6 78 767 4 NE Fa>r 3 cnm and cir str 7.00 82 872 91 82 2 77 2 79 770 9 NE Fair 3 cum and cir str 8 00 82 898 93 84 3 78 3 73 777 3 NE Clear. 2 cum 8 30 79 0 73 780 3 NE Clear 2 cum 9 00 83 .885 98 85 9 79 0 7i 78 J 0 NE Clear 2 cum 9 30 83 882 91 86 1 79 7 75 785 6 NE Clear 2 cum 10 00 83 872 90 87 1 80 2 72 788 6 NE Clear 2 cnm 10 30 84 865 89 86 1 79 1 72 791 3 NE Fjir 3 cnm. 11 00 86 841 86 87 1 79 5 68 794 3 NE Clear 2 cum 11 30 86 819 84 87 « HO 5 - 73 797 2 NE Clear 1 cnm 12 00 86 815 84 87 9 80 0 70 800.2 NE Clear. 1 cnm P M 12 30 86 791 81 88.0 80 2 70 802 9 NE Clear 1 cum 1 00 92 743 75 87 0 80 0 72 805 9 NE Fair 4 cum 1 30 89 748 76 87.7 80 5 73 817 6 NE Clear 2 cum 2 00 89 740 75 87.7 80 3 73 810 9 NE Clear 2 cum. 2 30 88 741 76 87 5 80.0 71 812 3 NE Clear 2 cum 3.00 88 745 76 87 0 79 9 72 814 5 NE Clear 2 cum 3 30 £7 748 77 86 1 79 2 72 816 8 NE Fair 3 cum 9 00 83 838 87 82 3 76 8 7b 855.7 E Clear 1 cum. Mwcellaneous —Minimum, 77 7 Minimum at ground, 77 8 Maximum, 88 4 

S O L A R E C L I P S E , M A Y 0, 1883, 49 A P R I L 30, 1883 Anemometer Barometer Thermometei g Weather Clouds Wind Observed Reduced Hour t Dry Wot "3 leading readiug M A M 6 00 8J 29.8 {5 29 87 81 0 7b 8 82 921.4 NE Cle.ar 2 cniu .uid cir str 7 00 82 858 89 82 H 79 0 83 925 3 NE Clear 2 cum 7 .iO 83 870 90 84 0 79 5 82 927 5 NE Clear 1 cum 8 00 83 869 90 84 1 78 8 80 929 5 NE Clear 2 turn 9 00 85 9 79 2 72 935 4 NE Clear 2 cum 9 .10 84 88t 91 8f> 2 79 6 72 9^8 0 NE Fair 4 cum 10 00 &5 868 89 85 0 79 2 75 939 6 NE Fair 5 cum 10 30 85 81)4 89 NE Clear 2 cum 11 00 80 848 87 8() 7 80 0 73 944 0 NE Clear 1 cum 11 30 rib 8ii 8''> 80 9 79 9 72 945 7 NE Clear 1 cum 12 00 86 a2i 84 86 8 80 0 73 947 9 NE Clear 2 cum P M 86 80") 8i 83 5 78 8 78 956 5 NE Fair 3 cum 1 00 2 00 86 78-J 80 84 8 79 1 75 968 3 NE Clear 1 com 3 00 88 775 79 84 8 7H 3 75 978 2 NE Clear 1 cum in hon/.on i 30 87 764 78 84 6 78 0 71 981 5 NE Clear I cum in horizon 4 00 86 770 79 83 8 77 8 75 984 8 NE Cle.ir 1 cum in horuon 4 30 86 785 81 83 2 77 2 75 987 2 NE Clear 1 cum in horizon 5 00 85 790 81 82 9 77 0 75 0 1 NE Cleai 1 cum in horizon 6 00 86 806 83 82 0 77 9 62 0 7 NE Clear 1 cum in horizon 9 00 84 873 90 82 0 77 6 82 20 8 NE Clear 1 cum ID horizon Mtscellaneous —Minimum, 79 5 Minimum at ground, 78 8 Maximum, 88 2 Slight showers at 5 00, 8 00, 10 00 a m , and 8 00 p m , inappreciable 12 30—1 00 p m , a wind squall passed over A t 12 35 the auemometei regisDeied 1 mile m 3 minutes 40 seconds, which equals 16 miles an hour Solar shadow bauds seeu l u the oast j u s t after sunset M A Y 1, 1883 Anemometer Baiometer Thermometer Rel hum Weather Clouds Wind Observed Reduced Hour t Dry Wet reading reading 1 1 A M 6 30 j 81 l9 76 0 74 86 8 NE Clear 1 cum and cir str in horizon 7 00 82 29 887 29 92 82 8 76 7 75 90 2 NE Clear 1 cum and cir str in honzon 7 30 82 891 93 83 5 77 0 71 94 0 NE Clear 1 cum in horiiion 8 00 82 899 93 84 3 77 8 71 97 9 NE Clear 2 cnm 8 30 83 907 94 85 5 77 6 69 101 4 NE Clear 2 cum 9 00 83 897 91 85 6 78 4 73 105 0 NE Cle.ar 1 cum and cir str 9 30 84 900 93 85 7 78 0 71 109 1 NE Clear 1 cum aud cir str 10 00 84 888 92 86 0 77 7 68 113 0 NE Clear 1 cum in bonzou 10 30 86 6 77 9 67 117 3 NE Clear 1 cum in hori/.on 11 00 85 875 90 85 8 77 1 66 121 5 NE Clear 1 cum in horizon 12 00 85 847 87 86 5 78 0 67 129 2 NE Clear 0 haze in horizou P M 1 00 85 820 85 86 8 78 1 66 13'') 6 NE Clear 1 cum aud cir str 2 00 80 802 82 8b 0 77 2 Ofa 142 7 NE Clear 1 cir str lu bouth 3 00 86 789 81 85 1 77 2 67 149 4 NE Clear 1 cir str ui south aud west 9 00 83 "95 93 81 5 76 1 78 187 0 NE Clear 1 cum Mwcellaneoua —Minimum, 80.2 Minimum at ground, 80 8 Maximum, 87 6. S. Mis, 110 7 

50 MEMOIRS OP T H E NATIONAL A C A D E M Y O F SCIENCES. M A Y 2, 1883. Anemometer Barometer Thermometer Rel hum Weather Clouds. Observed Hour Redifced Wind t Dry Wet reading reading A M. 6 30 81 6 76 0 78 246 8 NE Pair 3 ciuu 7 00 82 29 902 29 94 82 0 75 5 72 250 3 NE Clear 2 cum 8 00 82 909 94 84 0 76 2 67 258 1 NE Clear 1 cum 9 00 83 915 95 84 8 76 7 68 265 2 NE Clear 2 cum 10 00 83 910 94 86 0 76 8 66 270 7 NE Clear 1 cum 10 30 84 900 93 87 3 78 4 65 272 4 NE Cle.ir 1 cnm 11 00 84 887 92 87 0 78 0 66 273 6 NE Cleji 1 CIIIII 11 30 85 870 89 87 8 77 5 61 274 8 NE Clear 1 oum 12 00 85 .850 87 87 8 78 9 66 270 6 NE. Clear. 0 P, M 12.30 86 832 .85 87 4 78 0 62 277 9 N E Clear 0^ 1 00 86 825 85 87 0 77 9 66 278 9 N E Cle.ar n 2 00 2 30 86 87 807 802 .8i 82 87 1 86 7 78 0 78 0 66 67 279 7 Calm 280 0 Calm Clear Clear 8 0 3 00 86 .805 .83 84 5 76 2 67 280 5 N E Clear 0 3 30 86 808 83 84 5 76 6 67 281 4 N E Clear. 0 4 00 86 .817 .84 84.0 76 0 68 282 1 N E Clear 0 4 30 86 .827 85 83.1 75.7 68 283 5 N E Clear 0 5 00 85 845 .87 82 7 75 6 73 284.7 N E Clear 0 9 00 84 913' 94 81 0 75 0 74 292 7 N E Cle.ir 1 cum • JfMoelton«m»—Minimum, 80 2 Minimum at giound, 80 8 Maximum, 88.7. M A Y 3, 1883. Anemometer Barometer. Thermometer Rel hnm Weather Clouds. Hour. Observed Reduced Wind t Dry Wet reading reading A M 7 00 80 29 930 29 97 81 5 76 0 78 311 0 NE Clear 2 cuui 7 30 81 937 98 82 8 75 2 70 312 3 NE Clear . 2 cum 8 00 81 942 98 83 5 76 2 71 313 8 NE CIe.ir 2 Luni 8 30 82 940 98 85 0 77 4 67 315 6 NE Clear 1 cum. 9 00 82 • 8.37 97 85.3 77 9 69 317 5 NE Clear 1 cum 9 30 83 942 97 86 0 78 2 b8 320 2 NE Clear 1 cum 10 00 84 918 97 85 6 77 b b7 323 2 NE Fair 3 cum 10 30 84 92J 95 8b 8 78 0 66 326 2 E Clear 2 cum 11.00 85 908 93 87 5 79 0 67 329 2 NE Clear 2 cum 11 30 85 877 90 86 2 77 2 b5 332 5 NE Clear 1 cum 12'00 85 862 89 86 9 78 0 66 335 7 NE. Clear 1 cum in lioruon P M 12 30 85 836 86 86 0 77 5 68 338 0 NE Clear 1 cuiM in liori/ou. 1 00 86 825 85 8b 8 78 0 66 340 2 E Clear 1 cum in bori/.on 1 m 86 821 84 86 7 78 7 69 142 0 E Clear 1 cnm in horizon 2 00 86 5 7ti 0 69 ?44 2 E Clear 1 cum 2 30 86 807 ai 8b 0 78 b 70 346 1 E Fair < cum b 00 86 .838 86 82 f) 77 7 80 36 J 2 NE Cloudy 9 cum and iiiui. 7 00 84 91 77 2 7-| 0 90 ^74 I NE Cloudy 9 cum and mm 8 00 84 902 9i 77 5 75 5 90 382 3 NE Rain 10 cum 9 00 84 9.17 97 78 0 75 3 88 386 8 Calm Raiu 10 cum ' Probably should be 29.937 Miscellaneous—Minimum, 76.2. Minimum a t ground, 75.5 Maximum, 88 1 R a i n began at 6 00 p m L i g h t showers in the evening, w i t h occasional thunder and lightning. R a m f a U wega- nred on the 4th , 

S O L A R E C L I P S E , M A T 6, 1883. 61 M A Y 4, 1883 Anemometer Barometer Thermometer Rel hnm Weather Clouds. Wind Observed Reduced Hour t Dry Wcfc reading reading A M 7 00 74 2 74 0 99 403 8 NE Rain 10 mm 7 30 78 29 9^0 30 03 8 00 79 29 988 03 75 8 74 2 % 409 2 NE Rain 10 mm 9 00 79 30 010 06 70 2 75 2 96 414 5 NE Rai» 10 mm 10 00 79 29 986 03 76 2 74 5 93 423 b NE. Cloudj 10 str 11 00 79 968 01 fiO 0 76 1 82 429 2 NE Cloudy. 10 str 12 OU 80 960 30 00 81 8 75 8 75 435 6 N Cloudy 10 str P M 1 00 80 917 29 96 81 0 75 8 79 442 6 N Cloudv 10 str 2 00 80 880 92 82 0 75 6 74 443 3 N Cloudy 9 str 3 00 80 860 90 83 4 77 0 73 443 7 NE Cloudy 9 str 5 00 82 867 90 81 0 76 2 79 443 8 Calm Clear 2 cir , cir str , and s t r about horizon 6 00 81 883 92 77 5 74 8 86 443 8 Calm Clear 1 cir , c i r str , and str about horizon 9 00 80 938 98 76 0 74 3 94 444.9 Calm. Clear 0 Miscellaneous—Minimum, 72 4 Minimum at gronnd, 73 0 Maximum, 84 5 Rained hard and steadily after 1 00 a ra until 9 50 a m R a i n f a l l to 7 00 a m , 4 2 inches; after 7 00 a m , 0 5 inch ; total, 4 7 inches M A Y 5, 1883. Anemometer Barometer. Thermometer Rel hnm Weather Clouds. Wind B Observed Reduced t Dry. Wet. O reading. reading W A M 7 00 79 29 945 29 99 PO 9 77 8 88 463 0 NE Clear 2 cum and str. 8 00 81 957 30 00 82 2 77 7 82 469 7 NE Clear 1 cum and str 8 30 82 952 29 99 82 5 78 0 81 472 7 NE Clear. 2 cum and str. <) 00 82 950 99 83 0 77 7 80 476 4 NE Clear 2 cum and str 9 30 83 955 99' 83 0 78 2 80 4^0 0 E Clear 2 cum 10 00 83 955 99 83 2 7a 1 79 484 0 E Fair 3 cum 10.30 84 945 97 83 3 78 0 79 488 4 E Clear. 2 cum 11 00 84 9 52 9b 85 7 77 8 75 492 0 E Clear. 2 cum. 11 .50 84 918 95 83 7 78 5 81 496 5 E Clear 2 cnm 12 00 84 912 94 84 0 78 5 77 501 2 E Fair. 4 cnm cir. str , and str P M 1 00 85 .877 90 79 0 76 0 97 507 4 Calm. Fair. 7 cnm mm in east horizon 2 00 85 870 89 80 0 77 5 88 513 9 E Rain. 10 cnm and m m 3 00 84 852 88 82 5 76 7 76 519 4 E Fair •6 cum and str 6 00 84 • 876 91 81 8 78 1 Bi 532 1 E Fair. 4 cum and str 9 00 83 910 94 81 7 77 9 83 550 9 NE Clear. 1 cum lu horizon MtseeUaneous —Minimum, 75 4 Minimum at ground, 74.4 Maximum, 84.3. R a i n , 5 30-6 00 a m , giMng 0 4 i n c h , 12 45-12 55 p m , giving 0 15 i n c h ; a n d 150 to 2 10 p m , inap- preciable , total 0 55 inch 2 45 p m , top of a rainbow seen in eastern horizon. 5.45 p ni., one heavy dark baud extended from clouds m the west to the eastern horizon, evidently I L c shadow of the clouds. 

52 MEMOIES O FT H E NATIONAL ACADEMY O F SCIENCES. M A Y 6, 1883. Anemometer Barometer Thermometer Rel hum Weather Clouds Hour Observed Wind Reduced t. Dry Wet readiug reading A M 7 00 82 29 940 29 98 81 5 78 I 86 622 2 E Fair 3 cum. 8 00 83 949 98 83 3 79 4 81 631 3 E Fair 2 cum and liazo 8 30 83 953 99 84 9 78 9 74 6J6 0 E Fair 3 cuui and haze 9 00 83 953 99 83 0 79 0 82 040 1 E Fair 4 cum and h.i/u 9 30 83 960 99 79 6 78 6 98 645 3 E Cloudy 9 cum 9 45 86 958 98 82 7 79 8 89 647 2 E Fail 3 cnm 9 57 83 .952 98 83 6 80 0 83 649 3 E Fan 3 cum F o r observations in this interval see "Special Observations in connection with the Solar E c l i p s e " P M. 1 15 87 29 843 29 86 85 0 78 9 74 676 0 E Clear 2 cum 1 30 88 845 86 85 0 78 6 74 678 3 E Clear 2 cum 2 00 86 848 87 85 0 79 0 74 682 6 E Clear 1 cum 2 30 85 847 87 84 4 78 7 76 686 2 E Fair 3 cum 3 00 85 848 87 84 2 78 8 76 690 3 E Clear 2 cum 3 30 85 848 87 84 2 79 9 76 693 7 E Fair 4 cum 4 00 84 800 88 83 8 78 3 78 697 0 E Fair 3 cum 4 30 84 856 89 83 1 78 4 80 700 4 E Clear 2 cum 5 00 83 865 90 82 8 78 0 80 703 7 E Clear 2 cum 6 00 83 875 91 8Z I 77 9 82 710 3 E Fair. 3 cum .and haze 9 00 82 922 96 82 0 77 9 82 738 2 E Clear 2 cum Mucellaneous —Minimum, 79 2 Minimum at ground, 78 9 Maximum, 85 5 (modihed by t h e eclipse)' Showers 8 00-9 00 and 9 15-9 25 a m , giving 0 10 inch M A Y 7, 1883 Anemometer. Barometer. Thermometer Rel hum Weather Clouds Wind Observed Reduced Hour t Dry Wot reading. readiug ' A M 7 00 82 29 927 29 96 79 6 76 8 89 810 7 E R.im 10 str 9 00 82 955 99 85 0 79 8 80 828 0 E F.iii 4 cum 12 00 83 888 92 8b 0 79 8 74 . . . E F.II1 4 cum P M 6 00 84 813 .84 81 9 76 3 74 914 3 E F.air 3 cum 9 00 83 887 92 81 8 7b 4 78 941 9 E Clea'r 1 Clllll Miscellaneous —Minininin, 77 7. Maxiiuiim, 87 0 Rained at intervals in night and between 7 00 and 9 00 a m , giving 0 25 inch. M A Y 3, 1883 Anemometer Barometer Thermometer Rel hum Weather Clouds Wind Observed Reduced Hour t. Dry Wet reading reading A. M 7 00 81 29 870 29 91 81 7 76 8 80 33 0 E Fair 4 cum 12 00 84 628 86 83 6 79 a 81 81 3 E Cloudy 9 cum P M 6 00 83 800 83 82 2 78 2 81 143 5 E Fair 4 cuin 9 00 82 860 90 81 8 77 9 83 170 4 E Cle.ii 2 cum Mtscellanrous —Minimum, 79 9 Minimum at ground, 80 2 M.aximum, 8b 4 Several showers between 7 00 and 12 00 a m ; inappreciable