33* Sc'untljic NetuSy ^e, 



tual cautery on the animal fyftem, in fimilar difeafes, a new reftjmblancc is feen between the 

 difeafes which affedl the organic beings of both kingdoms, as well as between the remedies 

 by which they may be oppofed. — Soc. Philom. No. 27. An. VII. 



NEfF PUBLICATION. 



A SyJIem o/FamUiar Philofophy in twelve Leflures; being the courfe ufually read by Mr. 

 A. Walker. Containing, the elements and the praftical iifes to be drawn from the chemical 

 property of matter ; the principles and application of mechanics ; of hydroflatics ; of hydrau- 

 lics; of pneumatics ; of magnetifm ; of ele<£lricity; of optics; and of aftronomy. Including 

 every material modern difcovery and improvement to the prefent time. London, printed for 

 the author, and fold by Kearfley in London; price two guineas, 4to. 571 pages, with 47 cop- 

 per-plates. 



I. Mr. Walker's firft lefture is jntrodu£lory, on the nature of light and fire. 2. On the 

 properties of matter. 3. Mechanical powers. 4. Chemiftry. 5. Theatmofphere. 6. Hy- 

 droftatics and hydraulics. 7. Eleftricity. 8. The fame fubjeft. 9. Optics. 10. Aftrono- 

 my. II. Of the moon in particular. 12. Aftronomy continued. 



The public, for a long feries of years, has attended with pleafure and improvement to the 

 clear and perfpicuous leftures of this philofophcr, which makes it the lefs neceflary to enter, 

 at prefent, into any general charadler of his performance. Its particular charader, or the 

 features of novelty it exhibits, will be found to confift in certain theoretical pofitions, refpeft- 

 ing the mechanical and chemical effedts of light and fire, in the fyftem of the univerfe. As 

 I cannot, with fufficient brevity, give a detail and examination of thefe, upon which the 

 author has employed much time and labour, I muft leave this part of the fubjeft to the fci- 

 entific reader himfelf. 



