I 
errata. 
Page. Line. 
72. 2. for comunicated read communicated 
77. 12. for mercury removed without earning this to rife read removed 
without caufing the mercury to rife 
81. 9. for fmaller towards the middle read larger towards the middle 
391. — the laft line, for — read + 
4O3. 1 2. for — 54 read — 46 
408. 3. from the bottom, for -1* read H * 
n rn-\-m 
\ 
O o o 4 
f 
