i 20 Vegetable Statich. 



veffels near the bark, as is evident by their 

 being difcoloured) I have lince made ufe of 

 the cold cement of Bees-wax and Turpentine, 

 binding it fa ft over with wet bladder and pack- 

 thread, as in Exper. 34. 



Inftead of brafs-collars, which fcrewed 

 into each other, I often (efpecially with the 

 Syphons in Exper, 36, and 37.) made ufe 

 of two brafs collars, which were turned a 

 little tapering, fo that one entered and exaclly 

 .fitted the other. 



This joining of the two collars was ef- 

 fectually fecured from leaking, by firft 

 anointing them with a foft cement; and 

 they were fecured from being disjoined, by 

 the force of the afcending fap, by twifting 

 packthread round the protuberant knobs on 

 the iides of the collars. When I would 

 feparate the collars, I found it neceflary 

 (except in hot fun-fhine) to melt the foft 

 cement by applying hot irons on the out- 

 iide of the collars. 



It is needful to made all the cemented 

 joints from the fun with loofe folds of pa- 

 per, elfe its heat will often melt them, and 

 fo dilate the cement, as to make it be drove 

 forcibly up the tube, which defeats the. ex- 

 periment. 



The 





