v86 Mr. Gilbert Burnett on the Decay of Timber, <^c. 



•fairly to become useful as a test of the probable durability of 

 timber when exposed to atmospheric influences ; and hence I 

 forward them to the Journal of Science in their present rudi- 

 mentary state, both in order that they may be submitted to 

 more speedy and extensive proofs than individual opportunities 

 can offer, as well as with the hope that persons who may meet 

 with samples of oak, and yet not wish to be at the trouble of 

 the experiments, will send them to -me for examination. 

 Beheve me to remain. 



Yours, ever truly, 

 22, Great Marylebone-street Gilbert T. Burnett. 



Microscopic Illustrations, of a few new popular and diverting 

 Living Objects, with their Natural History, 8fc., conjoined 

 with accurate Descriptions of the latest Improvements in the 

 new Microscopes, the best Methods of constructing their 

 Mountings, Apparatus, 8fc., and complete Instructions for 



- using them, illustrated by highly .finished coloured En- 

 gravings from magnified Drawings of the actual living Sub- 

 jects. By C. R. Goring, M.D., and Andrew Pritchard. 

 Legent hcec nostra nepotes, London, Whittaker and Co. 

 Royal 8vo. boards. 



Microscopes having of late undergone a complete revo- 

 lution in their construction, it is, therefore, natural to ex7 

 pect new works upon them ; the present is one of such a class, 

 of which it forms a first part ; — it may be it is written some- 

 what in advance of the spirit of the present age ; rather for 

 posterity than for the present generation : for the new micro- 

 scopes are, as yet, only in the possession of scientific persons, 

 and have not found their way to the public at large ; never- 

 theless, we conceive that the present publication cannot fail, 

 in its own time, to recommend itself generally, for it is as* 

 sociated with elaborate descriptions and beautiful coloured 

 engravings of a variety of diverting and popular objects, 

 many of which are the same, if we mistake not, which 

 have already conferred much high gratification on the public, 

 in the exhibition of the achromatic solar microscope. 



The exordium or preface of this work is strongly tinged 

 with that admiration of the Supreme Intelligence which the 

 contemplation of the microscopic world so naturally inspires 3 

 and contains some arguments which appear to us to be 

 original. Chapters II. III. and VII. are devoted to the 

 description of the larva and pupa of a beautiful species of 



