364 BOTANICAL GAZETTE [NOVEMBER 
of the experiments. In the normal or untreated samples the increase 
in the number of organisms in one experiment was from 143,000 to 
6,000,000; while in the treated samples the number reached 94,000,- 
ooo. In the experiment shown in table V the normal increased from 
118,000 to 4,000,000; while the electrically treated reached 83,000,- 
ooo. The results are more striking than those obtained by the treat- 
ment of water, as might be expected, since there was more food avail- 
able for the use of the organisms in the latter series. 
TABLE IV 
Showing the influence of electricity (galvanic currents) on the bacteria in milk 
NUMBER OF BACTERIA IN rCC 
DATE OF MAKING 
CULTURE 
Normal Electrical 
May 10,2 BoM ws s.o. 143,395 143,395 
May 17,-9 ALM; 345 Ss. 809,112 3,874,421 
May 19,5 P.M es 54 1,470,441 86,592,600 
May 18,9 A. M....... 6,082,542* 94,851,806* 
* Milk sour. 
TABLE V 
Showing the influence of electricity (galvanic currents) on the bacteria of milk 
NUMBER OF BACTERIA IN 1CC 
DATE OF MAKING 2 
CULTURE 
Normal Electrical 
May 17, 10 A.M...... 118,542 118,542 
May 31955 PioMs ok. 678,333 1,848,806 
May 18, Io A.M...... 1,026,533 41,778,766 
May 18, 5 P.M....... 4,591,500* 83,363,866* 
* Milk sour. 
Another series of experiments was undertaken to demonstrate the 
effects of static electricity on bacteria in milk. For this purpose We 
employed a static machine of the Tépler-Holtz type, which was 
designed for X-ray work and is capable of producing a spark six 
inches or more in length. The method of plating, etc., was the same 
as has been previously described, and the culture jars were of the 
same type, except that the electrically stimulated jars were covered 
with tinfoil in the same way as a Leyden jar. The copper and zinc 
plates were dispensed with, of course, and the milk was charged 
direct from the static machine. In this series three jars were used: 
4 
. 
j 
