The Lab orator// 



85 



Fig. 28. Implements commonly used in plant tissue culture 

 work. From left to right : spiral loop used for transferring large 

 callus cultures intact; platinum spatula for transferring small cul- 

 tures; loop for transferring small roots, callus cultures, and sus- 

 pensions of bacteria, yeasts, etc.; hooked wire used by Bobbins to 

 transfer small pieces of roots; loop used in transferring root seg- 

 ments a centimeter or more in length; two types of scalpels with 

 replaceable blades, suitable for dissecting callus cultures in situ 

 and two smaller scalpels with fixed blades ; a surgeon 's ear-curette 

 used for making initial isolations of procambial and other meriste- 

 matic tissues from stems, galls, etc. ; glass spatula used for grinding 

 tissues and making inoculations to leaves in the study of viruses in 

 plant tissues; a surgeon's ear-and-throat scissor of a length suitable 

 for cutting up root cultures in a 125-ml. Erlenmeyer flask. Above, 

 two dissecting needles suitable for fine dissections, and two types 

 of forceps. 



