r* 



15 



LETTER VII. 



Good Sir, 



I Often refled: with the highefl ilulsfadion, up- 

 on our agreeable entertainment over Dr. Wood- 

 ward's Colledllon of Foffils, at your Univerfity, 

 laft Summer, and fhall be ready at all times, not 

 only to acknowledge myfelf very much indebted 

 to you for it, but like wife to contribute, as far 

 as I am able, towards enlarging the Collection, 

 as well as to give you now and then a few ferious 

 Thoughts upon the fubjedl. 



2, And having fome leifure time, which would 

 be worfe fpent this week, I fhall, purfuant to my 

 defign, take leave to acquaint you 3 that as I was 

 walking the other day in our Garden, I happen- 

 ed to pick up a fmall common Stone of an odd 

 fhape, which immediately put me upon confider- 

 ing, the Nature of Stones in general 3 and this 

 confideration led me to the following conclufive 

 Points, 17*2;. I. That Stones naturally grow. 2. 

 That it is often a difficult tafk to affign reafons 

 for their feveral Kinds, Colours, itrange Shapes, 

 and beautiful Impreffions. 3. That there may be 

 fuch things as Petrifadions. and 4. That it is 

 even poffible for us to invent artificial Stones, 

 which will be very durable. 



3. That 



