no V >get able StaUcks . 
veflels near the bark, as is evident by their 
being difcoloured) I have fince made ufe of 
the cold cement of Bees- wax and Turpen- 
tine, binding it faft 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 ex- 
aftly fitted the other. 
This joining of the two collars was ef- 
fectually fecured from leaking, by firft a- 
nointing them with a foft cement 5 and 
they were fecured from being disjoined, by 
the force of the afcending fap, by twitting 
pack-thread round the protuberant knobs 
onthefides of the collars. When I would 
feparate the collars, I found it neceffary 
(except in hot Sun-fhine) to melt the toft 
cement by applying hot irons on the out- 
ftde of the collars. 
It is needful to fhade all the cemented 
joints from the Sun with loofc 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 
