1921] 
GARDNER—GERMINATION 
TABLE XIV—Continued 
ata stele 
e1s1a| 83 =!5/8/ 818 
S 4 8 8 8 - 5 8 8 
EEDS Po ea be ek SEEDS Siolo}ajo}e 
Zinc sulphate Cobalt nitrate 
8 ES A el RR 
i fas Sel VRP oe carol 41 | 80 | 97 oe Thapsus | | 3t*! 06 | O8 joes 
BOR CONE. cs Nags. Ole Osta moe cho EEN al er’ ee 
— Carota 2] xe) we, Ot Dawei Garote ee ec Pig War a Bee Pat 
mothera biennis......|.._||__ |. 37 | 40} 51 etm He mc TON Ba PM 45:14:67 FAO hav cs 
Nicotiana Tabacum hae | neces Nicotiana Tabacum...|....].... Oe eg Oe 
Potassium nitrate Potassium hydroxide 
erbascum ed oy tee? . os | 36 | 82 | os Verbascum Thapsus o | 84 {too | 98 |.... 
— crispus. . 3) o 9 Rumex crispus........ A eh OL OL MO lises 
aucus Carota | 1 Bt att 8 Daucus FOUR. «soe doos Oh OY alse 
ne er [S81 OL 155 Oenothera biennis..... sore] ©} 44] SS | 42}. 
Nicotiana Tabacum. .__|__ "| |: st | 50 | 23 | 23 Nicotiana bse Mier OF 99-1 Ses Se tu 
Ammonium nitrate Ammonium hydroxide 
Mitomapet spines. ++-| © | 62 [100 | 82 | og |....|| Verbascum Thapsus | I | 00 | OS |.++- 
Rumex mveceeres of 9 fig} 3 ....|| Rumex crispus Cc Se bE heaes 
Ftc ‘Carota ° OL pars cil Daucus Carnte a. aise e ede ee roe ee ee Bae 
nN nothera biennis.... ._ °; 70 | 66! 68 | 64 “|| Oenothera biennis.....|....|.... SE [ui sit oe eae 
icotiana Tabacum oo} 54] 73 | 34 | 28 |....]| Nicotiana Tabacum...|....|.... ET £81 88 Acces 
Sodium nitrate Sodium hydroxide 
erb 8 oa ae 
psus. © | 64 |100 1 |....|| Verbascum Thapsus o | 8 | 96 | 83 
Rumex Cres es. ° nm 26 -" vs i df UE CRIS Succes Oly @bl 8 Live 
aucus Carota........ OP Oboe 6 aa Daves Carte cc Ol Seed 8 fee ee 
N othera scopes kk o | 60 | 67 | 67 | 50 |....}/| Oenothera biennis..... axes} 0} SO 1.57 120 [ose 
icotiana Tabacu o | 38 | 34 | 29 | a1 |....|| Nicotiana Tabacum...|....| 0 | 21 | 3 | 16 
Aluminum nitrate Hydrochloric acid 
POUR) Cte hes. sarin ee Thapsus. . ee ° 36 | 6x 92 
Rumex crispus....../1'| 1.1" ee 7 " : ks Rumex — o} oj] o{ ° 
‘aucus Carota aysil ® Daucus Caro! PUR Ss Pee Of 5:12) .% 
Oenothera biennis.. ||! |)! 2)!" 12 | 571 55 Genothers eet bras orgs Bp 5 | 61 | 56) 60 
Nicotiana Tabacum. | ./|/ 2. "|" 7") o}| 10 | 314 Nicotiana Tabacum...|....|.--- ) ops 22 | 10 
ee 
* Little more than swelling. 
From table XIV it appears that organic acids, bases, and salts 
of monovalent, bivalent, and trivalent ions induce germination in 
darkness of seeds of Verbascum Thapsus (80-100 per cent) , Oenothera 
biennis (40-60 per cent), and Nzcotiana Tabacum (10-50 per cent), 
while they inhibit the germination of seeds of Rumex crispus and 
These results were confirmed in an attempt to 
determine the minimum effective concentration of the electrolytes. 
In this attempt it was found that as good germination in darkness 
Daucus Carota. 
