418 APPENDIX 



Laboratory Equipment 



The following articles comprise a simple equipment for a laboratory class of 

 ten. The equipment for larger classes is proportionately less in price. The follow- 

 ing articles may be obtained from any reliable dealer in laboratory supplies, such as 

 the Bausch and Lomb Optical Company of Rochester, N.Y., or the Kny-Scheerer 

 Company, 404, 410 West 27th Street, New York City : — 



1 balance. Harvard trip style, with weights on carrier. 



1 bell jar, about 365 mm. high by 165 mm. in diameter. 

 10 wide mouth (salt mouth) bottles, with corks to fit. 



10 25 c.c. dropping bottles for iodine, etc. 

 25 250 c.c. glass-stoppered bottles for stock solutions. 

 100 test tubes, assorted sizes, principally 6" X |". 

 50 test tubes on base (excellent for denaonstrations). 



2 graduated cylinders, one to 100 c.c, one to 500 c.c. 



1 package filter paper 3(X) mm. in diameter. 

 10 flasks, Erlenmeyer form, 500 c.c. capacity. 



2 glass funnels, one 50, one 150 mm. in diameter. 



30 Petri dishes, 100 mm. in diameter, 10 mm. in depth. 

 10 feet glass tubing, soft, sizes 2, 3, 4, 5, 6, assorted. 



1 aquarium jar, 10 liters capacity. 



2 specimen jars, glass tops, of about 1 liter capacity. 

 10 hand magnifiers, vulcanite or tripod form. 



2 compound demonstration microscopes or 1 more expensive compound micro* 

 scope. 

 300 insect pins, Klaeger, 3 sizes assorted. 

 10 feet rubber tubing to fit glass tubing, size | inch. 



1 chemical thermometer graduated to 100° C. 

 15 agate ware or tin trays about 350 mm. long by 100 wide. 

 1 gal. 95 per cent alcohol. (Do not use denatured alcohol.) 

 1 set gram weights, 1 mg. to 100 g. 2 books test paper, red and blue. 



1 razor, for cutting sections. 10 Syracuse watch glasses. 



1 box rubber bands, assorted sizes. 1 steam sterilizer (tin will do). 



1 support stand with rings. 1 spool fine copper wire. 



1 test tube rack. 1 alcohol lamp. 6 oz. nitric acid. 



5 test tube brushes. 1 gross slides. 6 oz. ammonium hydrate. 



10 pairs scissors. 100 cover slips No. 2. 6 oz. benzole or xylol. 



10 pairs forceps. 1 mortar and pestle. 6 oz. chloroform. 



20 needles in handles. 2 bulb pipettes. | lb. copper sulphate. 



10 scapels. 1 liter formol. ^ lb. sodium hydroxide. 



12 mason jars, pints. 1 oz. iodine cryst. | lb. rochelle salts. 



12 mason jars, quarts. 1 oz. potassium iodide. 6 oz. glycerine. 



The materials for Pasteur's solution Sach's nutrient solution can best be obtained 

 from a druggist at the time needed and in very small and accurately measured 

 quantities. 



The agar or gelatine cultures in Petri dishes may be obtained from the local 

 Board of Health or from any good druggist. These cultures are not difficult to 

 make, but take a number of hours' consecutive work, often diflicult for the average 

 teacher to obtain. Full directions how to prepare these cultures will be found in 

 Hunter's Laboratory Problems in Civic Biology. 



