154 
On the 3d, the temperature reached 89° in the sun. 
Snow fell on six days, snow and rain on one, and rain on 
six. Total amount, 2.2 inches. 
One lunar halo and one lunar corona were observed. 
Aprin, 1874. Temperature. Pressure. Humidity. 
Maximum Gone 30.475 Saturation. 
Minimum 25.° 29.368 NG 
Range 38.° 1.107 84.° 
Mean 42.41° 29.894. 65.42° 
The thermometer rose to 92° in the sun, on the 6th and 
14th. 
Snow fell on one day, snow and rain on four, and rain on 
ten. Total amount, 8.9 inches. Thunder-showers occurred 
on the 5th and 20th. 
May, 1874. Temperature. Pressure. Humidity. 
Maximum 88.° 30.326 Saturation, 
Minimum 43.° 29.429 19.5° 
Range 45,.° 897 80.5° 
Mean 60.7° 29.890 53.77° 
119° was marked by the thermometer, in the sun, on the 
10th. 
Rain fell on ten days, but to a total amount of only 2 inch- 
es. Thunder-showers occurred on the 21st and 25th. 
One aurora was noted, and one lunar halo. 
A comparison of the several monthly averages, and also 
those of the whole Spring, with the deaths in the city for the 
corresponding periods, shows the following results :— 
March. April. May. Spring. 
Mean temperature 39.06 ° 42.41° 60.7° 47.39° 
Mean pressure 29.837 29.894 29.89 29.873 
Mean humidity 62.63° 65.42° 53.77° 60.61° 
Deaths under one year 501 500 543 1544 
Deaths of all ages 2306 2119 2182 6607 
Pror. D. 8. MARTIN reported to the society the particulars of 
the arrangements for natural history observations and collec- 
tions in connection with the Transit Expedition, now about to 
sail. As he had mentioned before, the object proposed by the 
Lyceum, in its memorial, had been substantially met by the ap- 
pointment ofa scientific gentleman as Assistant Surgeon to the 
expedition. This officer was Dr. J. H. Kidder. Prof. 
