i^ 8 Anfwers to ^series on Vepetatw?!, Feb, 



Icl'^ proportion , it nouriflies the roots, and refrefhes the foliage 

 in a \ ei;' confiderable degree, 'f not faddenlj evaporated by the I, eat 

 ol till' fun. Can'^ot fav to ivhat extent it is favourable, much de- 

 pending boili on the nature of the plant and the feafon. 



IV. Concerning Light and Heat. 



Anf. to Qnef. i. Giving tlie natural colour to foliage, flowers, 

 ar.d fruits ; making the fap tiow and circulate ; increafing the fa- 

 rinacions matter in grain ; and increafing the faccharine matter 

 in, and enhancing the flavour of fruits in general. 



2. Yes ; but excepting the fungi tribe, Ldo not know of any 

 whofe flowers and fruit have been produced in perfeftion. 



3. Mofl certainly. 



4. Surely, inafiuuch as grain, railed in warm or improved cli- 

 mates, is more rich and productive oi Jplrit, than that railed in 

 cold or unimproved fituations. 



5. It is neceiTary to keep many kinds of cuttings almojl in the 

 dark, until they have taken root ; and all kinds are the better for 

 being fhaded from the ftrong rays of the fun till then. 



6. Not always ; the)* arc equally liable to pcriJi becaufe of wet, 

 drought, or froil, according to their natures. 



7. Certainly. 



o. In a very confiderable degree of degradation. 



9. Generally more mild,, but alfo fometimes more pernicious. 

 If the fteam is conflned in a flue the fame as fmoke, the efFe6t is 

 the fame. If it is fiiffered to diffufe, it is falutary in a dry, and 

 pernicious in a moift climate. 



10. \i properly managed, hot walls have much lefs eiFe£l: in 

 promoting the growth, than in perfefting the ai.nual ihoots, of 

 plants placed againfl them ; as, by the time artificial heat is ap- 

 plied (which fliould not be before the middle of July), their ve- 

 getative powers for the feafon will be nearly exhaufled. Fire- 

 heat is with propriety applied to flued walls which have no glafs 

 covering in the autumn, in order to aid nature, in a cold climate, 

 in ripening the ihoots and buds dcftined to produce the fucceeding 

 cro'^ of fruit. But the attempt to force fruits on thefe walls in 

 the fpring has not been generally attended with fuccefs. 



Bv painting part of a brick-wall black, agaiffl which one wing 

 of a pcich-trce was nailed, and letting that part, againll which 

 the other wing was nailed, remain in its natural ilate or colour, it 

 has bserr afccrtained, that black does very conliderably abforb 

 hear, as :he fruit on the painted part were ripe ten days fooner 

 than on the oth r. 



1 1-. I think the Danes extremely right in this practice j and I am 



convinced 



