)| 
TOXIC EFFECT OF DELETERIOUS AGENTS 305 
c 2H . 
always contains 262144% molecules, ng contains 5242882 mole- 
cules, and so on. 
Hydrochloric acid, HCl; 70, 230, 614. This acid, on account | 
of its very high ionization at the critical points, and because of | 
iSvery wide use in physiological and chemical investigations 
by other workers, has been taken as a standard by which we shall | 
compare the others. In making these comparisons, HCl, being 
‘ the most highly ionized of all acids, is assumed to represent the 
_Yalue of ionic H. This is a purely arbitrary assumption, and 
the reader will bear in mind that when we speak of ‘the toxic 
Value of ionic H” we mean the nearest approach we could make 
| to determining its toxic value for the molds, viz., that of 91% 
| tinic H +-9% HCL. 
[The following “ coefficients’? have been worked out for 
: HC with these five molds: coefficient of injury, 70; coefficient 
. of inhibition, 230; coefficient of death-point, 614. 
These coefficients mean that on an average for the five forms 
ied 2. 
2048 of a normal solution caused distinct injury to the 
| taltures, 23° 
614 
2048 
tion of the Spores, and 
pew of 2—has been used throughout this paper in determining 
“ents. As a matter of convenience the numerator only 
expressed in discussing the three critical points of the 
'S agents, giving as it does at a glance the correct relative 
: J of the agents. The absolute value of any coefficient 
(in cither mold or agent) be determined by simply supply- 
‘Omitted denominator, 2048, the resulting fraction being 
“TY Case that proportion of a normal solution. In dis- 
Ng the 
oe . 
2048 Of a normal solution inhibited the germina- 
of a normal solution killed the 
‘Pores, The denominator of the fractions, 2048—the eleventh | 
a 
