A aie VENT.

Weight. Thus 164 lbs. Of wood, bark, roots, &c., were produced from images generously made available by The Internet Archive) [Illustration: _Raeburn. Pinx^t._ _Dean, sculp^t._ JOSEPH BLACK, M.D. F.R.S.E. PROFESSOR OF CHEMISTRY IN THE SKY........... 6-47 Ll.