( 73* ) 
with two Ccnvexes and a Concave. The Terreflrial 
Telefcope, with three Convexes, and two others with 
four Convexes ; of each of thefe he gives the Schemes 
and demonftrates their Effe&s. 
ERRATA inlbme former Numbers of thefe Tra&s. 
ilia .r^fSt'd ^.V^Xf''*!' •* ' '-fr'- l > 
NUmb. 192 Page 4*2. line 4. dele Jive. p. 489. 1. 26. dele him* N°. 194. 
p. 544. I 5. r.fiepe. p. 554. 1. 6. for Breaft r. B*c£. N°. 195. p. S$$. 
1. 12.* r. 16%. p. $68. I. 1?. for more r. jmv*. N°. 196. p. 584. 1. penult, 
r. Cbartula.y. 587. 1.4. t.ntfiit. p. $89. & 590. inMarg. r; Fig* 3. p. 593. 
1. 6, r. Animalcules. 
LONDON: 
Printed for S. Smith and B. Waif or Printers to the 
Royal Society ,at the Princes Arms in St, Ws Church- 
yard, 1693. 
