1896 ] TOXIC ACTION OF DISSOLVED SALTS 93 
5. ACID-POTASSIUM SULFATE (KHSO,). 
(Begun January 10, 6 P.M.; closed January II, I P.M.) 
Concentration 
gm, equiv. per liter Length Remarks 
soo bo ieee flabby, dead 
e200 30.5. apparently normal 
Pee Teo 2.0 wee se “ 
Tab00 ope ssi se “6 
6. Hyprocuioric acip.. MARCH 7, IO A.M. 
(Concentration: yyyy gm. mol. per liter.) 
No. os * tee 7,2 P.M. ie S pes 7,3 P.M. 
I iso 3.0" 7.o flabby 
2 13.5" 5 19.0 “ ol 
3 13:5 co 16.5.- © 
4 19.5 66 4.5 ‘ 19.5 ‘“ 
Av. growth perhr.o.g1™™ | All dead. 
7. HyprRocHLoric acip. MARCH 7, IO A.M. 
(Concentration: ;#yy gm. mol. per liter.) 
March yas , 8 P.M. March 8, 11.30 A.M, 
No, 20° C. 7,2P.M me oo 7,8 P.M os*C. 11.30 
I 19. eens gece 20 Se ar 34,00" II omm™ 
2 | 18.5 “ 24%). baog * a0“ faee 2.5 “ 
3-205 POS 22.0 “ 2.5 * 28.0 * 6.0 : 
4 1 190 * 40 * 22.5 “ 3.6“ | 340 “ 11.5 
Av. growth per hr. 1.03™™ Av. growth per hr. 0.5™™ | Av. growth per hr. 0.2™™ 
i ie Pe ae eet eC cae 
It will be noticed, on inspecting tables I to 5, that in the 
lowest fatal dilution, a growth prior to death of from 5™™ to 10" 
usually occurred. This raised the question whether, in case of 
the acids the hydrogen ions might not act catalytically and 
hasten the chemical processes of the cells and possibly also the 
growth of the radicle. Experiments with hydrochloric acid 
