185 
The hydrogen peroxide used is known as “commercial, 10 vols.” 
and was not diluted. The price is 5s. per gallon. The same liquid. 
may be used for treating several consecutive batches of seed, until 
its fungicidal action becomes exhausted. It is fit for use so long as 
it is capable of bleaching a rose-coloured solution of permanganate 
of potash, to which a few drops of sulphuric acid have been added. 
(Condy’s fluid may be used as a substitute for permanganate of 
potash. ) 
Hydrogen peroxide keeps better when the vessel containing it is 
somletete filled ; it should also be kept in a cool place, and in the 
dark. Taking everything into consideration, sterilisation of se 
by means of hydrogen peroxide is cheaper and much more 
effective than by any method - hgprk wij known. The prepara- 
tion of hydrogen peroxide imple process, and in tropical 
countries where its dobeiltdration would be hastened, it would be 
advisable to have it prepared on the spot. 
n the following tables the particulars of ot ing ine on 
various seeds and fungus spores are given in deta 
TREATMENT OF SEED. 
wei ; 4 First 
tie Time of appearance Remarks. 
an treatment. above 
number sown. ground. 
untreated .. ; he 7 = 
Cucurbita pepo (6) ...|+ treated 4 hrs. ys fter 8 days plants 
sr hrs. ai from treated and un- 
— anguind |} seated 4 hrs.| 7 days a 5 iesdkages 7d 
(6). treated 24 hrs.; 8 days deren whl 
enitreated re equal size; while 
. after 14 days the 
Cucumis melo (14)... ested 4 hrs,| 5 days Batches treated: fo¥ 
a pee 2a hrs.| 6 days 34 hee showed moat 
-> | 4 days growth. 
Lagenaria vulgaris (6) treated “4 hrs.| 5 days 
fo hrs. : ae 
Acacia Richii (3) wf sceeae e bag: od ie ; 
8 days Treated seed produced 
Clitoria glycinoides (3) {reat 2 24 hrs. | 16 days feeble seedlings. 
— pulcherrima w rested 2 G owee te 
days 
Bauhinia tomentosa (3) funte d 24 heen: killed 
— | Plants from treated 
Sweet Peas untreated ...| 7 days and untreated seeds 
Hivelyn: Hemus (10) { treated 24 hrs. | 11 days t equal in-size 5 days 
untreated ...| 7 days after the treated 
Dainty Spencer (10) { feeated 24 hrs.| 14 days || plants appeared 
 |jJ above grou 
untreated 7 days” 
Lord Nelson (10)... br killed 
ne is Plants from treated. 
ato & and untreated seeds 
Ricinus communis (2) | ireetad 4 hrs.| 6 ive { equal in size from 
the first. 
