equipment is for more modest uses. It is also less expensive. A key- 
board punch may be used instead of the simple conductor's punch to 
speed up the punching operation. A gang punch is aveilable for punch- 
-ing a number of cards (up to 200) at a time. Alignment blocks, file 
boxes, and multiple-needle sorting racks are also available. Most of 
this supplementary equipment ig developed to speed up punching and 
sorting, and is more useful and efficient for larger jobs. 
Literature Cited 
‘Cottam, Grant, and J. T. curtis. 1948 
The use of the punched card method in: phytosociological research. 
Eoology 29(4):; 516-519 
7456) 
