1909] STONE—ELECTRICITY AND MICROORGANISMS 365 
one normal, one treated with positive, and one with negative charges. — 
The milk in the electrically treated jars was charged with sparks from 
a static machine in the same way that a Leyden jar is charged, an 
electroscope being used to determine the nature of the charge. In 
the milk experiments which follow it should be pointed out that the 
charges varied considerably. 
TABLE VI 
Showing the influence of static electricity (positive and negative charges) upon the 
bacteria in milk. Electrical jars charged with one spark each June rr. 
NUMBER OF BACTERIA IN 1CC 
Date OF MAKING 
ETI Electrical (positi Electrical (negative 
Normal pais a oe Gata 
1S are ane eee ee 8,342 9342 8,342 
Wee 865s ee 69,000 196,300 ieee Gee 
PUNE 920 ae 568,000 000 67,500 
| 3S ee eee 1,213,000 16,432,500 19,374,600 / 
Bete tes ee 9,876,400 0,500,000 000,000 
ne Sa ae ee 27,432,000 153,461,000 be ane te 
Se ee oe 190,500,000* 267,000,000* 233;339;000 
* Milk curdled. 
TABLE VII 
Showing the influence of static electricity (positive and negative charges) upon 
the bacteria in milk. Electrical j jars charged with 1o sparks each June 2. 
| NUMBER OF BACTERIA IN ICC 
Date OF MAKING : 
CULTURE Electrical (positive Electrical (negative 
Normal - charge) charge) 
nade BIO Aas ae 65,000 ove 565,000 
une 2, 5 “ fie ape 73,0 597; 245333 
June 3, 10 A. M 19,057,000 23,443,066 18,088,333 
gene's, oP M5, 5. 107,440,000 151,510,000 I ee 
June 4,10 A.M., 2 201,413,333* 287,380,000* 212,816,666 
* Milk sour. 
In the experiment shown in table VI one large spark was given 
each electrically treated jar, one being given a positive and the other 
4 negative charge, and in the one shown in table VII the number 
of sparks was increased to 10. The electrical treatment, the results 
of which are shown in table VI, where the milk was charged with a 
Single spark and cultures made every 24 hours, gave rise to a decided 
acceleration. This acceleration was perceptible at the time of the 
