44 



EFFECTS OF THIRST, ETC., ON EMYS TERRAPIN. 



24. Bl#od of a Salt-water Terrapin (Emys terrapin), which had been kept with- 

 out food and drink for -forty days. July 23. 



Weight, June 16 

 July 23 



14.285 grains. 

 11.400 " 



In thirty-eight days this terrapin had lost 2.885 grains, 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 without any intermission. 



This animal was probably enfeebled, by long fasting, 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 .... 199.41 



serum 

 " in serum of 1000 parts of blood 



Water in 1000 parts of blood 

 " " serum 



1000 parts of blood contained — 



Water ..... 



Blood-corpuscles (dried organic constituents) 

 Albumen and extractive matter . 

 Fibrin ..... 

 Fixed saline constituents 



1000 parts of blood contained — 



Moist blood-corpuscles 500.00 ] ' ' . 



(Solid constituents 



(Water . 



Liquor sanguinis 



500.00 



(.Solid constituents 



400 parts of blood contained — 



Water ..... 

 Blood-corpuscles (dried organic constituents) 

 Albumen, fatty and extractive matter 

 Fibrin ..... 

 Fixed saline constituents 

 Solid constituents in 400 grains of blood 



" in serum of 400 grains of blood 



79.50 



6915 



800.59 



920.50 



800.59 

 118.5G 



64.85 

 5. 26 



10.74 



375.00 



125.00 



425.59 



74.41 



320.23 

 47.43 

 25.94 

 2.11 

 4.29 

 79.76 

 27.66 



