1906] FULTON—CHEMOTROPISM OF FUNGI 89 
affected. The repellent effect was much less marked, never affecting 
more than one-fourth of the hyphae, and even in the most marked 
cases some of the hyphae would grow toward the tubes and enter 
them. Table I gives the most marked instances of attraction and 
repulsion noted in the series; the symbols have been explained above. 
In Table II is given a comparison of the effects of a number 
of representative compounds as observed by Miyosnr and in the 
present investigation. Leaving out of consideration Saprolegnia 
jerax, the extreme effects recorded in Mryosut’s table were obtained 
TABLE It 
Aspexott- |__ STERIG- 
Mucor MUCEDO LUs NIGER | MATOC¥STIS 
REAGENT NIGRA 
I i iil IV 
onobasic sree phot, 2 Joss. a3 ae ar ar 
Monobasic sodium phosphate, 2 %....... ae a2? ed bi 
utral ammonium oles phate, 2%...... ay az a2 as 
al ammonium phosphate, 0.2% ee ax ee ar 
Neutral ammonium phosphate, 0.1 %.. ay os ciate 
Pirate, By eee es eae G a3 az? az r 
Potassiuin nitrate, ¢ 0... 2... 2 es seca r ay r _ 
Calcium nitrate, 29%... 60 0c eee e e ar Tr . 
Magnesium sulfate, 2%.........++...+- r fc) r r 
€ ice Mike eo se we se ew eeee a3 ° ar ° 
Potassium chlorid, 2%... 02.02.0000 r ° r 2 
odi OM Bek usivi'g on aees os r ° r ° 
um-potassium tartrate, Oe Nee eee r a2? r ° 
Cane sugar, 2 A epee avccste sey Garg wks ta ae ay ° ar ° 
2a ree tetera we cae a eae a — 
= ee Epeloe Sat ee bs eee ae ° ae ° 
us iy Boy Pape ee ae eg a3 ar a2 ar? 
ad = pe Paine © pe ere ay *e - 
Lactose, 2 2% Oe ence es a, ay? vee 
Oey kk MESON chivas ESET ok week ay ay? 
Malice’ 2 %, Rohe Wire hw eee e Wie ay ete ay ° see 
ER 2 Sear ee Ey tee ro fs) ax? 
Dextrose, $0 Geet ee a, aa ae 
ies OR een gr ea er ee ° ay 
a 2 %, WOKS Ste Big ce ee a ae eee Bae ag a3 5h 
1% ee ee a3 r ? ay ° 
Ethyl alobol, Wists paSiy penne aces z a2? r ay? 
— i eee ele ao a kee a eee we we ay 3° ay ? ay Fi 
a SEE SS SRUREN, Manian eae tae pe ag a2? ax ar? 
2 oF EEE SEE acer pene eas te Sees ° ay? ° ay? 
. Peptone, re eae ° aot az? 
J M. - % Peer w ere e sere ress eerteonese a3 a2 mae 
leat extract, ta ee RES re ere ay ag ag ? 
1% a3 ar ag ay 
es eS aries ay ° as af 
Rs ae eee ay ° ° ar? 
