1908] 



BRIEFER ARTICLES 



53 



Name 



Abutilon (golden bells)... 



Begonia coccinea 



Chrysanthemum frutes- 



cens (marguerite) . 



Coleus 



Cucurbita Pepo (squash) 

 Euphorbia pulcherrima 



(poinsettia) 



Ficus elastica (rubber 



plant) 



Fuchsia speciosa 



Hedera Helix (English 



jyy) 



Helianthus annuus (sun- 

 flower) 



Heliotropium peruvia- 

 num (heliotrope) 



Impatiens Holstii. 



Lupinus albus (white 

 lupine) 



Lycopersicum esculen- 

 tum (tomato-dwarf 

 stone) 



Pelargonium domesti- 

 cum (Lady Washing- 

 ton geranium) 



Pelargonium peltatura 

 (ivy-leaved ^ranium) 



Pelargonium zonale 

 (horse-shoe geranium) 



Phaseolus vulgaris 

 (string bean) 



Ricinus communis (cas- 

 tor bean) 



Salvia involucrata 



Senecio mikanioides 

 (German ivy) 



Senecio Petasitis ■ 



Tropaeolum majus (nas- 

 turtium) 



Zea Mais 



No. 



of 

 [dants 



3 

 I 



4 

 2 



I 



I 

 6 



I 

 I 



2 

 I 



X 



1 

 z 



I 

 1 



Exudation 

 quantity ia cc. 



Min. Mean Max. 



I - 1-9-3 3 

 168 



24 -40 - 

 II. 5-14. 2- 



27 

 2.5 



Durat'n 

 of 



flow 

 in days 



29 



55 I 9-21 

 17 8-9 



12 



23 



16.5-99.2-263 



1.5 



30 



7 

 3 



31 

 12-34 



13 



17.4 

 4.5 



16 



8 

 3 



13 



I4-SS-5-I7-5 ^9r2 



o 



4- 4.2- 4-5 



8.5 

 14 



27 

 110 



13.5 



4 



5 



^7 

 12 



7 

 14 



8 

 6 



No. 

 of 



plants 



4 



3 



4 

 2 



3 



3 



s 



4 

 2 



10 



2 

 3 



2 

 2 



Pressure in atmoeiAeres 



Min. >rc;m Max. 



.757- -795- -^40 

 .81S- .858- .S9S 



.847-1.014-1.230 

 .822- .897- .972 



573- -637- '101 



.737T .817- 

 .887-1.246-1 



.323- .430- 

 1.210-1.276-1 



.809-1.045-1 

 .851- .855 



897 



605 



538 

 343 



294 

 860 



793- .807- .821 



1.015-1.164-1.349 



.714- .861- .909 

 .940-1.001-1. 063 



.620- .SS1-1.116 



j .908-1.002-1.149 



.666- .692- .718 

 1.151-1.369-1-57^ 



.518- .633- .648 

 1.137-1.191-1-246 



•759- -77^ 800 



Stems are too 50ft and weaL I could not attach the gauge successfully 

 to the following: Cucurhlta Pepo, Zea Mais, and Vieia Faba, Ob.-iously 

 stemiess plants cannot be used. Thus comparatively few of the common 



plants are practicable. . • j 



The minimum pressures for any given plant in the table were obtained 



in the winter months and the maximum pressures in Apnl and May showing 



a variation in pressure with time of year which is probably widespread. 



