412 



SCIENCE. 



A continuous registering thermometer for recording the 

 temperature of the body has just been described by its in- 

 ventor, M. Marey. It consists of a brass tube communi- 

 cating with a Bourdon manometer, containing oil, and 

 closed. Any change of temperature, by altering the inter- 

 nal pressure, makes the curved manometer tube curl more 

 or less, and to it is fixed an index which registers the move- 

 ments by inscribing them on a recording cylinder. The 

 thermometric bulb may be at some distance from the in- 



scribing apparatus, being connected by a flexible tube of 

 annealed copper. Two such bulbs may be applied to differ- 

 ent parts of the body, even to the interior. It is possible 

 therefore to note the relation between the temperatures of 

 the interior and exterior of the body. If we remember 

 rightly, an analogous but more portable instrument was 

 suggested some time ago by Mr. Donald Macalister, but 

 we are not aware whether his instrument is yet before the 

 public. 



SUN SPOTS. 



The following record of observations made by Mr. D. P. Todd, Assistant, has been forwarded by Prof. S. Newcomb, U. S. Navy. 

 Superintendent Nautical Almanac Office, Washington, D. C. 



DATE, 

 JUNE, 1881. 



No. of New 



Groups. 



Spots. 



7i 5P.m 



1 



2 



11, 7 a. m 



2 



20 



12, 9 a. m 



2 



5 



i5i 9 a - m 



2 



10 



16, 7 a. m — — 











18, 7 a. m 











19, 2 p. m 











21, 10 a. m .. 











22, 10 a. m 











23, 8 a. m 



2 



5 



24, 5 P. m 







7 



26, 1 p. m _ 



1 



■st 



29, 8 a. m 



1 



■St 



30, 9 a. m 











Disappeared by 

 Solar Rotation. 



Groups. Spots. 



Reappeared by 



Total Number 



Solar Rotation. 



Visible. 



Groups. 



Spots. 



Groups. 



Spots. 



1 



2 



3 



9. 







4 



40T 



1 



2 



5 



45+ 



1 



3 



7 



50+ 











7 



40T 











S 



Ml 







-o 



4 



15 











3 



10 











2 



5 



2 



5 



4 



10 











4 





1 



IS 



4 



4ot 



1 



10 



5 



65+ 











5 



6ot 



Remarks. 



Many of the spots small. 

 Many of the spots small. 



t Approximated. 

 Published by order of the Secretary of War. 



Faculae were seen at the time of every observation. 

 W. B. Hazen, Brig. & But. Maj. Gen I Chief Signal Officer, U. S. A 



METEOROLOGICAL REPORT FOR NEW YORK CITY FOR THE WEEK ENDING AUG. 20, 1881. 



Latitude^ 45' 58" N.; Longitude 73 57' 58" W.; height of instruments above the ground, 53 feet ; above the sea. 97 



feet ; by self-recording instruments. 



BAROMETER. 



THERMOMETERS. 





MEAN FOR 



THE day. 



MAXIMUM. 



MINIMUM. 



MEAN. 



MAXIMUM. 



MINIMUM. 



maxi'm 



AUGUST. 



Reduced 

 to 



Freezing. 



Reduced 

 to 



Freezing. 



Time. 



Reduced 

 to 



Freezing. 



Time. 



Dry 

 Bulb. 



Wet 

 Bulb. 



Dry- 

 Bulb. 



Time. 



Wet 

 Bulb. 



Time. 



Dry 

 Bulb. 



Time. 



Wet 

 Bulb. 



Time. 



In Sun. 



Sunday, 14- - 

 Monday, 15-. 

 Tuesday, 16.. 

 Wednesday, 17- . 

 Thursday, 18. _ 

 Friday, 19- - 

 Saturday, 20.. 



29.686 

 29.902 

 30.031 

 30.031 

 29.919 

 29.786 

 29.651 



29.778 

 29.986 

 30.062 

 30.064 

 30.000 

 29.890 

 29.718 



12 p. m. 

 12 p. m. 

 10 p. m. 



g a. m. 



a. m, 



a. m. 



a. m. 



29.596 

 29.778 

 29.986 

 30 000 

 29.890 

 29.71 8 

 29.600 



a. m. 



a. m. 



a. m. 

 12 p. m. 

 12 p. m. 

 12 p. m. 



6 p. m. 



7I-3 

 69.6 

 66.3 



6O.3 



63.6 

 67.0 

 73-7 



64.0 

 63.6 

 60.7 

 58.0 

 60.0 

 63.6 

 67.0 



78 

 76 

 7' 

 67 

 67 

 70 

 81 



3 p. m. 



3 p. m. 

 1 p. m, 



4 p. m. 

 3 P- m - 



3 p. m. 



4 p. m. 



71 



66 

 62 

 60 

 62 



65 

 70 



a. m. 



2 p. m. 



1 p. m. 

 5 p. m. 



10 p. m. 



3 p. m. 



4 p. m. 



66 

 63 

 59 

 56 

 57 

 64 

 66 



12 p. m. 



5 a. m. 

 12 p. m. 



5 a. in. 



1 a. m. 



3 a. m. 



4 a. m. 



62 

 60 

 57 

 55 

 57 

 61 

 64 



12 p. m. 



5 a. m. 

 12 p. m. 



5 a. m. 



1 a. m. 



3 a. m. 



4 a. m. 



140. 

 140. 

 134- 

 115. 

 98. 

 ri4. 

 144. 



Mean for the week 29.858 inches. 



Maximum for the week at 9 a. m., August 17th 30.064 " 



Minimum " at o a. m., August 14th 29.596 " 



Range 468 " 



Dry. Wet. 



Mean for the week 67.4 degrees 62.4 degrees. 



Maximum for the week.at 4 pm. 20th Si. " at o am 14th, 71. 

 Minimum " " 5 am. 17th 56. " at 5 am 17th, 55. " 

 Range " " 25. " 16. 



WIND. 



AUGUST. 



M- 



DIRECTION. 



7 a. m. 



2 p. m. 



9 p. m. 



n. w. 



n. n w. 



n. n. w. 



n. n. e. 



n. n. e. 



n. n. e. 



n. n. e. 



e. n. e. 



e. n. e. 



n. e. 



e. 



s. s. e. 



n. n. e. 



e. n. e. 



n. n. e. 



n. 



n. n. w. 



n. n. w. 



n. e. 



n. e. 



n. n. w. 



Sunday, 

 Monday, 15. 

 Tuesday, 16. 

 Wednesday, 17 



Friday, 19. 

 Saturday, 20 



Distance traveled during the week. 

 Maximum force 



VELOCITY 

 IN MILES. 



Distance 

 for the 

 Day. 



213 

 234 

 «5» 

 »45 

 116 



83 

 73 



FORCE IN 

 LBS. PER 

 SQR. FEET. 



Time. 



6.20 am 

 2.00 am 

 10.20 am 

 9.00 am 

 4.00 am 



2.00 pm 



2j4|n.ioam 



HYGROMETER. 



FORCE OF VAPOR. 



B 



6 



S 



6 



E 



E 



rt 



ci 



0. 



rt 



0. 



0. 



r-s 



M 



o\ 



r-» 



M 



c* 



•543 

 • 489 

 .470 

 .422 

 .456 



.492 



•532 

 .462 

 .460 

 .470 



.462 

 .509 

 •433 

 ■473 

 •483 



79 

 74 

 73 

 87 

 88 



53 

 63 



65 

 83 

 73 



65 

 74 

 73 

 88 

 78 



.516 



.S64 



•556 



83 



80 



84 



•556 



■537 



.628 



84 



54 



72 



RELATIVE 

 HUMIDITY. 



CLOUDS. 



CLEAR, 

 OVERCAST. 



2 cir. cu. 4 cir. cu 

 1 cir. s. 1 7 cir. cu 

 7 cir.cu. 10 

 4 cir. cu. 10 

 10 9 cu. 



9 cu. 

 8 cu. 



,9 cu. 

 3 cu. 



9 cu. 

 4 cu. 

 I cu. 



RAIN AND SNOW. 



DEPTH OK RAIN AND SNOW 

 IN INCHES. 



Time 



of 

 Begin- 

 ing. 



11 p ni 



1 a m 

 112 a m 



2 a m. 

 12 m. 



1. 00 



0.30 



£ * 

 < o 



1,015 

 7 



miles, 

 lbs. 



Total amount of water for the week 03 inch. 



Duration of rain 2 hours, 30 minutes. 



DANIEL DRAPER, Ph. D. 

 Director Meteorological Observatory of the Department of Public Parks, New York. 



