44 



EFFECTS OF THIRST, ETC., ON EMYS TERRAPIN. 



24. Blood of a Salt-water Terrapin [Emijs terrapin), which had been kept with- 

 out food and drink for forty days. Jnly 23. 



Weight, June 16 

 " July 23 



14.285 grains. 

 11.400 " 



In thirty-eight days this terrapin had lost 2.885 gra,inSj a little more than one- 

 fifth of its whole weight. 



The amount of blood obtained was not more than one-third as much as that 

 procured from terrapins, a short time after their removal from the water. 



The blood coagulated rapidly, especially the portions drawn last, which coagu- 

 lated almost as soon as they reached the bottom of the vessel. 



The serum was of a bright, golden color. It was difficult to obtain any amount 

 of it perfectly free from the coloring matter of the blood-corpuscles. When treated 

 with sulphuric acid and a gentle heat, the characteristic odor of the animal was 

 developed. 



The blood-corpuscles presented no unusual appearance under the microscope, and 

 gave the characteristic reactions with chemical reagents. This fact proves that a 

 free interchange between the exterior liquor sanguinis and the internal fluid con- 

 tents of the blood-corpuscles must have been carried on Avithout any intermission. 



This animal was probably enfeebled, by long fastings to a less extent than other 

 animals of this class, because it had deposited eggs only a short time before its 

 capture. , 

 Amount of blood obtained, about 400 grains. 



Solid constituents in 1000 parts of blood 

 " " " serum 



" in serum of 1000 parts of Islood 



Water in 1000 parts of blood 

 " " serum 



1000 parts of blood contained — 



Water ..... 

 331ood-corpuscles (dried organic constituents) 

 Albumen and extractive matter . 

 Fibrin . . . 



Fixed saline constituents 



1000 parts of blood contained — 



Moist blood-corpuscles 500.00 -J * 



( Solid constituents 



Liquor sanguinis 500.00 .f^^^^^ 



( Solid constituents 



400 parts of blood contained — 



Water ..... 

 Blood-corpuscles (dried organic constituents) 

 Albumen, fatty and cxti'active matter 

 Fibrin ..... 

 Fixed saline constituents 

 Solid constituents in 400 grains of blood 



" in serum of 400 grains of blood 



199.41 

 19.50 

 G9 15 

 800.59 

 920.50 



800.59 

 118.56 



64.85 

 5.26 



lO.U 



375.00 

 125.00 

 425.59 

 U.41 



320.23 

 4t.43 

 25.94 

 2.11 

 4.29 

 19.16 

 21.66 



