APPARATUS AND GLASSWARE. 433 



tubes. A few petrie dishes. Bell jars, a few tall ones and a 

 few low and broad. Thistle tubes. Chemical thermometer. 



Balance for weighing. A small hand-scale furnished by Eimer 

 & Amend, 205-211 3d Ave., N. Y., is fairly good (^2.00). 



For pot experiments, the "Harvard trip-scale," Fairbanks 

 Scale Co. (about $6.00). 



Apparatus stand, small, several, with clamps for holding test 

 tubes, U tubes, etc. 



Agate trays, ^•ery shallow, several centimeters long and wide. 

 Agate pans, deep, for use as aquaria, etc. , with glass to cover. 



Paraffin or wax, for sealing joints in setting up transpiration 

 apparatus. 



iSIercury, for restoration of turgidity, and for lifting power of 

 transpiration. 



Sheet rubber, or prepared vessels for enclosing pots to prevent 

 evaporation of \\ater from surface during transpiration experi- 

 ments. 



Litmus paper, blue, kept in a tightly stoppered bottle. Filter 

 paper for use as absorbent paper. Lens paper (fine Japanese 

 paper) for use in cleaning lenses ; benzine for first moistening 

 the surface, and as an aid in cleaning. 



For materials for culture solution, see Chapter IIL 



Reagents. 



Glycerine, alcohol of commercial (95^) strength, formalin or 

 formalose of 409^ strength, chloral hydrate crystals, iodine crys- 

 tals, eosin crystals, fuchsin crystals, potassium iodide, potassium 

 hydrate, potash alum. It is convenient also to ha-\e on hand 

 some ammonia, sulphuric acid, nitric acid, and muriatic acid in 

 small quantity. 



REAGENTS READY FOR USE AND FOR STORING PLANT MATERIAL 



IN. 



Alcohol. Besides the 95^ strength, strengths of 30^, 50JJ, and 

 yofp, for killing material and bringing it up to 70^^ for storage. 



