APPENDIX 



331 



become completely insensible. The skin may then be cut through 

 at the junction of the skull and spinal column ; the muscles 

 behind the occipital bone cut through, the medulla exposed, 

 before the brain or the brain and spinal cord is destroyed. 



A frog, after the brain has been destroyed, may be curarized 

 by injecting one drop of a *5 p.c. solution of curari under the skin 

 of the back. More than is necessary should not be given if the 

 circulation is to be observed. In the case of a newt, after the 

 brain has been destroyed, two drops of 1 p.c. curari may be 

 injected in the abdominal cavity with a Pravatz syringe. 



The following rough table may be useful to the student. 



1 litre 

 1 minim 

 1 pint 

 1 gallon 

 1 fluid ounce 

 1 sq. inch 

 1 cubic inch 

 1 gram 

 1 kilogram 

 1 grain 

 1 drachm 

 1 oz. Troy 

 1 oz. Avoird. 

 1 Ib. Avoird. 

 1 centimetre 

 1 metre 

 1 inch 

 1 foot 

 1 yard 



inch 



inch 



inch 



= 1 cubic decimetre = 1| pints nearly. 

 = -059 cubic centimetre. 

 = 0-57 litre. 

 = 4 '54 litres. 

 = ^ pint. 



6-45 sq. centimetres. 

 =~L6'39 cubic centimetres. 

 = 15-43 grains. 



= 35-27 oz. Avoird. = 2'21bj!. 



= 65 milligrams. 



= 3-88 grams. 



= 31-1 grams. 



= 28'35 grams. 



= 0-45 kilogram. 



= f- inch. 



= 1 yard 3^ inches. 



= 2-54 centimetres. 



= 3 -05 decimetres. 



0*91 metre. 



= $ millimetre about. 

 = 12-7 /t. 

 = 10-16 /*. 



