Smoking French Vineyards. 119 
able to assess their pro-rata share upon such inhabi- 
tants of the districts as refuse to join, and _ that 
these assessments may be collected by the tax- 
gatherer, a provision which it would be easier to in- 
troduce and enforce in France, perhaps, than in this 
country.’’ Fig. 10 is an illustration of the protec- 
tion of a vineyard, from Lestout.* 
Fig. 10. Smudge over a French vineyard. 
Making currents of air.—Since frosts occur on 
still nights, it is sometimes possible to prevent 
them by keeping the air in motion, thereby mixing 
the air and preventing any part of it from lying 
on the plant until it shall have become frost-cold 
by loss of radiated heat. In small areas, as in 
choice gardens, it is often feasible to employ a man 
at night to pass back and forth waving a large 
*The Lestout system has been used at Cornell with satisfaction. 
