112 



BACTERIA IN RELATION TO PLANT DISEASES. 



(fig. 96) sufficiently indicate what is necessary to form a satisfactory record. This 

 could, of course, be considerably abbreviated by a system of symbols or by depend- 

 ing to a larger extent on the "Notes." 



In case of the inoculations, on the contrary, only as many series are made use 

 of as there are diseases under consideration. Each plant is generally given a single 

 number, no matter in how many places it ma}' be inoculated, the separate inocula- 

 tions being kept distinct, if necessary, by sub-numbers. Each series begins with 



Fig. 98.* 



No. i and continues in an unbroken sequence as long as the disease is under con- 

 sideration. The labels written on soft wood, covered for this purpose on one side 

 with white paint, are stuck into the earth or wired to the plant. Transcripts from 

 two such labels are shown in fig. 97. 



FIG 1.18. Three sheets showing method of keeping maximum and minimum temperature rec- 

 onK One-half actual size. 



