PHYSIOLOGICAL EFFICIENCY OF ACIDS to 
butyric acid, the other with benzoic. As usual, the acid was 
diluted with half grammolecular sodium chloride solution. 
TABLE XIX 
Bourtyric Acip 
LENGTH OF 
EXPosuRE TO— 3/5,000 | 5/5,000 | 6/5,000 | 7/5,000 | 8/5,000 |10 5,000 
N N N N | N N 
meninute:...:G >... - 0 0 0 5% | 5% | 5% 
Hi MAITAUGE os. oc eyes erste 0 0) 14% | 100 100 100 
IP AMINUbES =... + 2-2 0 48% 2 i Tem Le RN Ug nee Nea Pl liars 5 a 
DRMAUNULES's ces ene o.0 6.5: << 2% GOR LOOK ot Rimes gine aoc store 
PAINLESS ete seu. <a 3 1a fect IPE arse triste vei |Past hal Kohat ce 
SEIMAMULES sche eps-eieve.s 6 5 Sestak, |g soustenctesal i iotenehet Sea Nocera, Uteerenae ate 
AGINNITNULES: ots sake ole 8 <.s 2310) = eoectiacrennl WR Rea cen lars Senne] I tet eee tm LB 220 a, 
EYRIMITIUGER ene s ecetels:s «'< A (Die ahi sect Sele eee oat ce ete | eevet tata pe, mera 
Guminwtes?..-. os. 3. Oem |e Sak stairs aise |b sober is cae ae 
eMmINUbeSs fs-.0 6 oe. OOM atic lisoe occ Nic wesc as ee ene 
TABLE XX 
Benzoic Acip 
LENGTH OF ExPosuRE |___ 
12/50,000 N 18/50,000 N 24/56,000 N 
PSPERTEIV UL Gioia ens -o se oe oe 0 OMS omaha Pree 
MNIMUGE sss cos oe 0 3% 30% 
ME SEENUIGES one.aceers os oe 0 60 100 
PARUURIENMTGES Hoey e, <).cie) ces Ges s 0 LOO Se |e a aks: 
pRUETITTULLCS so cieee- 3-0 e063 ee es ee x iene cate dons 
ASTIENULCS ot sus aes eine ss Oe We Sarl rR ee Seles Corres 
BFOLTTEENULECS a6 s:. soeits ons <%= OF Saale tae te sae ee be eee 
GuAIMULES eae ech ays sie: OF i a oh es eee 
7) TESTS (eS es ere ee ree roe cee 
SeUMUMNLES ete «oko. css «> OSs (Oe cas es ee ae 
As a rule membrane formation cannot be elicited by the 
use of butyric acid at a lower concentration than 3/5,000 N. 
Even at concentrations of 3/5,000 N butyric acid is usually 
without effect. When, however, the effective value is attained, 
the optimum concentration is also quickly reached. The same 
is true of benzoic acid, only in this case the effective value 4s 
much lower than for butyric acid, being 18/50,000 N. 
14 
% 
Yy r 
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