248 BOTANICAL GAZETTE, [Sept., 
forming extensive forests, co-ordinates, which may be occasionally grown in 
extensive plantations for their economic value, though properly not desirable 
for dominant forest growth, and subordinates which are useful to fill up the 
forest stand, 
€ most important qualities for the consideration of the forester, pos- 
sessed by different timbers in a different degree, are the relation of their de- 
As the preservation of soil humidity becomes a necessity all over the 
world only such species as are capable of shading the soil against undue evap- 
oration should be chosen for the dominant forest. These are the shade-endur- 
ing ones. 
A study of the form-development must precede consideration of rates of 
growth. Trees may be classified according ‘o their greater tendency to de- 
velop the bole or the crown. Their true habitus must be studied in the open; 
the dense forest influences the development especially of the jatter class, it stim- 
ulates height-growth. Soil, situation and age influence form-development, the 
energy of height-growth being increased in fresh and deep soils, while shallow 
and compact soils, altitude, cold winds reduce this energy.—RB. E. FeRNow 
EDITORIAL. 
It Is PROBABLY safe to say that the botanists form the best compacted or- 
ganization cf scientific workers in the country. Their work demands the most 
widespread exchange of facts, and this has led to correspondence which has 
often ripened into friendship, This can be plainly seen at such meetings as the 
speedy publication, and the meetings of the Botanical Club, which bring all 
workers into more sympathetic relationship. We would urge upon botanists 
who have not already ped out their work that they select at once some 
convenient subject for investigation during the coming year, so that at their 
