APPARATUS AND REAGENTS. 295 



sharps) with the eye end set into a soft pine penholder or similar 

 handle. They must be kept sharp on a fine oil-stone. 



Drawing materials. — A medium pencil (No. 3 or M) and a very 

 hard one (No. 6 or 6 H) should be used and kept sharp. Slips of 

 heaviest linen ledger paper (120 lb.) cut 14 X 8 cm. are recom- 

 mended. Only one drawing should be put on a slip. 



APPARATUS FOR PHYSIOLOGY. 



Since much of the apparatus needs to be put together by the 

 student, the requisites are mainly tools and a good supply of tub- 

 ing, both glass and rubber, bottles, and bell jars. The following 

 will enable the foregoing experiments to be carried out. 



Tools. — Hammer, fine saw, three or four chisels, assorted files, 

 brace and assorted bits, screw-driver, smoothing plane, with a 

 supply of nails (especially finishing nails) and screws will be 

 found most useful. 



Glass tubing. — A little capillary tubing (0.5 mm. bore) will 

 be needed. Most used sizes are 5 mm. (3 mm. bore), 7 mm. 

 (5 mm. bore.) Some larger sizes (13 and 19 mm.) will also be 

 useful. 



Rubber tubing. — 3 and 5 mm. bore mostly ; some of 10 and 15 

 mm. bore. 



Bottles. — Wide-mouthed, various sizes, up to i liter. 



Tumblers.— ]^\\y glasses answer well. .Odd lids and glass dishes 

 from homes and stores can be made useful. 



Corks. — Assorted sizes. Several rubber stoppers, sizes 8, 10, 12, 

 3-hole, are desirable. 



Bell jars. — Several sizes are necessary ; 15 X 20 and 20 X 30 cm. 

 will be found useful ; also at least one 30 X 50 cm. All should 

 have ground rim and tubulure at top. 



Funnels. — Glass, asserted sizes. 6, 8, and 12 cm. diam. are 

 most used ; there should also be two or three larger ones. 



Filter paper. — Buy cut filters 15 and 18 cm. in diameter. 



Thermometers. — Should be graduated in degrees, —10° to-f- lOO' 

 C, with milk-glass scale. 



Test tubes. — 2 X 15 cm. is a convenient size. 



J-tubes. — Two sizes, 5 and 10 mm. bore. 



Bunsen burners. — If gas is not available, gasolene burners 

 should be substituted. 



