94 BOTANICAL GAZETTE [auGusT 
have thus far yielded entirely negative results. Tables 6 to II 
give the record of these experiments, but more work along this 
line is needed. The first column simply numbers the experi- 
ment; the remainder give the results at the times and tempera-_ 
tures named. 
8. DISTILLED WATER (Controi). MARCH 7, 10 A.M. 
hea 7) 2PM. cg 7,8 P.M. — 8, 11: 30 PoM: 
20°C, °C, 25°C, 
19,0" 4.0™™ 23.0™™ 4.0mm 31 .omm 8.0m" 
a ee 26.5 “ 5.0 “ 36.5 “ pgs’ 
41:0“ 6.0 28.5 ‘ oes 43.0 “ 14.54 
21.0 “ 6.0 “ 26.0 “ 5.0" 36.0 “ 10.0" 
Ay. growth per hr. 1.5™™ | Avy. growth per hr. 0.87™" | Av. growth per hr. 0.69™ 
9- DisTILLED WATER (Control). Marcu 14, II AM. 
March 14,3 P.M. | March 15.10 a.m, |March 16, 9:30 A.M.| March 17, 11 A.M. March 19, 3 Ee 
20° C, 22°C, 25°C, 23°C. 20° C. 
18.5™™ 3.5™ | 345mm 16,¢mm | gy mm 175"™ | 66.0™™ 14.07 | 86.5% 20 
17.5% 2.5 eee 105" 1545 % 20.5" | 71.0" 165% | 968” ae 
1851 35% 1360" 17.5% | 56.0% 20.0% | 76.5% 20.5“ [104.0 “ ae 
18.5 3.5 28.0 “ 0.5 “ 45.0 “6 17.0 “ 59.0 “ 14.0 $6 87. 5 20. 
Ay. growth per Av. growth per |Ay. growth pe 
hr. o. 
Av. th per 
hr. 0.81™™ hr. 0.8 yum : aah 0.63" 
to. HypRocHLoric acip. MARCH 14, II AM. 
(Concentration: shy gm. mol. per liter.) 
March 14, 3 Pm. pees 15,10 A.M. {March 16, 9:30 4 n:.| March 17, 11 A.M. ey 195 
. ae" C, oe 
20° C. Cc c 23°C c 
pa ed : 
17.0°" 2.9mm 26.0™m omm mm mm m mm | 87, — 
Bo" < 30% Vaggu ; a ese ThST | 5.0m BEST es «“ 
< 5-0 15. 60.0 -0 ie 
CO 4 pe 
18.5 « 3.5 a 20.0" 11.5 ‘kc : “ 0° 19.0 
= “ } “ - 39.5 9.5 “ 52.0 “ 12.5 Fi. . 0 
— apie a 14.0“ | 49.0% 16.0% | 69.0% 20.0 * | 90.0 “ — 
Petree ae ee ari, 
Av. growth per |Av. growth per Ae A wth per 
: v. v. gro 
hr. 0.78™m hr. 2 ge gp tee a aed Pa hr. 0.357 
mm 
ee, 
| 
