The Laboratory 79 



how an office should be arranged, so that that need 

 not be treated in detail here. 



What has been outlined above is approximately 

 an ideal suite. Most setups will, of course, fall 

 short of this ideal, but that need not detract from 

 the quality of the work done so long as the prob- 

 lems attacked are restricted to those for which 

 the available equipment is adequate. Good work 

 has been done in many a garret. But it must be 

 remembered that the garret is usually the birth- 

 place of sciences, not their adult milieu. Jacques 

 Loeb's tumblers and finger bowls would hardly 

 have sufficed for the determination of particle 

 shape of virus molecules. 



Most of the equipment used in preparing and 

 maintaining plant tissue cultures — glassware, im- 

 plements, etc. — are the same as those available 

 in any good microbiological laboratory, so that 

 they need only be enumerated. There are, how- 

 ever, a few items not so likely to be found in the 

 average laboratory. 



Glassware. Graduates, pipettes, Erlenmeyer 

 flasks, balloon flasks, beakers, Stender dishes, 

 watch glasses, test tubes, hollow ground slides, 

 cover slips of various sizes and shapes, burettes, 

 etc., are, of course, stock necessities. Most cul- 

 tures of both roots and callus can best be main- 

 tained in 125 ml. Erlenmeyer flasks. These can 



