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 may be inoculated, the separate inocula- 
tions being kept distinct, if necessary, by sub-numbers. Each series begins with 
7 Fig. 98.* 
No. r 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. . 
*Fic. 98.—Three sheets showing method of keeping maximum and minimum temperature rec- 
ords. One-half actual size. 
