SO BENDING WOOD. 



rents in water, when the temperature varies from 32 to 40°. 

 This is to repeat the 1(1 experiment, with the difference that 

 the mafs of water fhould be at the temperature 40°, and the 

 ball at 32° ; in which cafe the thermometer in the cup would 

 not be at all afFeded upon Count R.'s principle; but if the 

 explanation I have attempted above be accurate, no material 

 difference in the refults of the two experiments would be ob- 

 ferved. 



I am your's, 



J. DALTON. 



Manchejler, Augujl 17, 1805. 



VI. 



On the Art of bending Wood. By J. H. Hassenfratz.** 



Either live or JL HE operation of bending may be performed either on live 

 blended. ""* or ^ eac * w0 °d> the proceffes differing however for thefe two 

 fiates. 



I. On the bending of Live Wood, 



Live wood may Live wood has a natural elafticity f , which varies according 

 ** to its fpecies, fize, and age. The larger and older the wood, 



the lefs elafticity it polTefles. 



This operation is performed on wood when growing, either 



to flraighten it, to give it a figure fuitable to the ornamental 



purpofe for which it is defigned, or to (hape it to the ufe for 



—bended for which the timber is intended when cut. Thus trees may be 



fhip-.build.ng, or bended, which are intended for the building of fliips, or for 

 wheels &c making the felloes of wheels in one piece. 

 Bv fattening When trees are yet young and pliable, their ftems are faft- 



dowh y« un S ened down by ropes, or poles, or flakes, or frames. In this 



fituation they are confined till they will retain when let loofe 



the curvature that has been given them. 

 This themoft Of all the modes of bending timber the mod eafy and com- 

 eafy procefs j modious is that applied to young growing trees: for their pli- 



* Tranflated from the Journal des Mines, N. 94, p. 475, July, 

 3 804. 



■f In many parts of this paper the writer feems to have ufed the 

 word elaflicite for the property of undergoing flexure without break- 

 ing. T. 



antnefs 



