236 THE ZOOLOGIST. 



respecting the weight of different animals. Enquiries were therefore 

 addressed to one of the leading experts on this subject, Mr. Carl Hagen- 

 beck, of Hamburg, by whose courtesy the following data were contributed. 

 The average weight of adult individuals of the subjoined species and 

 varieties of animals is as follows : — 



Lions (male) 150-180 kilo (330 to 396 lb.) 



(Female Lions are somewhat 

 less in weight.) 



Tigers, Indian and Siberian 100-150 „ (220 to 380 lb.) 



Bears, Asiatic, e.g. Thibet Bears 80-120 „ (166 to 264 lb.) 



Bears, Russian and Caucasian... 100-170 „ (220 to 374 lb.) 



Bears, American (Grizzly) 150-225 „ (330 to 495 lb.) 



Wolves, Russian and American 30-55 „ (66 to 121 lb.) 



Foxes, European " 5-8 „ (11 to 17 lb.) 



According to these data the certain lethal doses for the internal appli- 

 cation of strychnia nitrate are, in round figures, as follows : — 



For Lions 07 grm. (lO^ gr.) 



For Tigers 0-6 „ (10 gr.) 



For Bears (Asiatic) 0-5 „ (7^ gr.) 



For Bears (Russian and Caucasian) 0*7 „ (10|- gr.) 



For Bears (American) 0-9 „ (14 gr.) 



For Wolves 025 „ (4 gr.) 



For Foxes 0-035 „ (i gr.) 



The lethal doses suitable for birds of prey may be calculated from a 

 table which I. Schneider* has recently compiled for a few domesticated 

 birds. According to this table the internal lethal doses per kilo (2i lb.) 

 are as follows : — 



For Geese 2-3-3-0 mgr. {^ to /^ gr.) 



of strychnise nitras. 



For Ducks 30-4-5 mgr. (/^ to ^^gt.) 



For Fowls (which exhibit a remark- 

 able capacity for resisting the ac- 

 tion of the poison) 30-140 mgr. (^ to 2^ gr.) 



For Pigeons 8-5-11-0 mgr. [^ to ^ gr.) 



The corresponding experiments showed that it was immaterial both 

 with regard to the intensity of the action and the time required for the fatal 

 issue whether the preparation was given as an aqueous solution, or whether 

 the birds were fed with strychnia wheat. 



In the general interest it may be mentioned that, as pointed out by 



'••'■ ' Monatsschr. f. prakt. Thierheilk.,' by Frohner andKitt., vol. xi. No. 6, 

 p. 245, 



