88 



Artificial Incubation. 



[may, 



Table I.— Comparative Temperature in the Open Air 

 and in the Incubator Room. 



Date. 



Outside. 



Incubator Room. 



Maximum 

 Temp. 



Minimum 

 Temp. 



Morning 

 Temp. 



Morning 

 Humidity of 

 Atmosphere.* 



Afternoon 

 Temp. 



1904. 

 April 4 ... 



„ 18 ... 

 May 2 ... 



„ 16 ... 



„ 3° ••• 

 June 13 ... 



27 ... 

 Aug. 1 ... 



>i 15 ■•• 



„ 29 ... 

 Sept. 12 ... 



„ 26 ... 

 Oct. 10 ... 



„ 24 ... 

 Nov. 7 ... 



„ 21 ... 

 'Dec. 5 ... 



» 19 



1905. 

 Jan. 2 ... 

 » 16 ... 

 „ SO ... 

 Feb. 13 ... 



„ 27 ... 

 Mar. 13 ... 

 27 



F. 



I 9 

 63 

 70 



74 

 69 

 76 

 85 

 79 

 73 

 70 



60 

 57 



56 

 47 

 53 

 54 



32 

 35 

 45 

 45 

 59 

 59 

 59 



F. 

 45 

 34 

 4i 



37 

 5i 

 52 

 54 

 54 

 52 

 45 

 37 

 35 

 33 

 47 

 47 

 28 

 40 

 26 



18 



25 

 28 



30 

 32 

 35 

 4* 



F. 



60 



68 

 62 

 66 



65 

 68 

 66 

 70 



68 



73 

 62 



59 

 65 

 60 

 to 

 52 

 57 

 52 



48 

 40 

 52 

 57 

 5o 

 54 

 59 



76 

 73 

 94 

 94 



88 



78 

 83 

 65 

 73 



79 



I 7 

 82 



78 

 7i 

 7i 

 74 

 8j 



74 



93 

 63 

 86 

 70 

 68 

 80 

 66 



F. 

 61 

 68 

 59 

 64 

 70 

 70 

 67 

 74 

 70 



79 

 62 



63 

 63 

 66 



57 

 53 

 58 

 54 



45 

 42 

 53 

 64 

 54 

 58 

 66 



* A wet and dry bulb hygrometer is used, by which the temperature of the 

 room is recorded, with the saturation point ; and the humidity is calculated by 

 means of Glaisher's hygrometrical tables. 



representative of the entire year. Comparisons with 1903-4 

 show that in the months of April, May, June, 1904, February 

 and March, 1905, the temperature was higher than in the cor- 

 responding months of the previous year, and that in August, 

 1904, and January, 1905, the temperature was lower than in 

 the corresponding months of the previous period. - The lowest 

 temperature recorded in 1903-4 was in January, 1904 (23° F.), 

 whereas in January, 1905, 18 0 F., or 14 0 of frost, was reached. 

 In so far as the whole year under review is concerned, the 

 temperature was higher than during the preceding twelve 

 months. In this connection it is of special importance to note 



