Vtgetahle Statkh. 1 1 3 
cement, that it may the better now adhere : 
Wlren the cement is cold, 1 pull away the 
gut , and ferew on the glafs tubes. 
But finding fome inconvenience in this 
hot cement (becaufe its heat kills the fap 
veflels near the bark, as is evident by their 
being difcoloured) I have fince made ufeof 
the cold cement of Bees- wax and Turpen- 
tine, binding it faft over with wet bUd*'* 
der and packthread, as in Exper. 34. 
Inftead of brafs-collars, which ferewed 
into each other , I often (efpecially with the 
Syphons in Exper. 3 7> and 38.) made ufe 
of two brafs-collars, which were turned a 
little tapering, fo that one entered and ex- 
aftly fitted the other. 
This joining of the two collars was cf- 
fcdually fecured from leaking, by firft a- 
nointing them with a foft cement ; and 
they were fecured from being disjoined, by 
the force of the afeending fap, by t willing 
pack-thread round the protuberant knobs 
on>the lides of the collars. When I would 
feparate the collars, I found it neceffary 
(except in hot Sunfhine) to melt the foft 
cement by applying hoc irons on the out- 
fide of the collars. 
I 
It 
