CONTENTS. 
On the Choice of Steel, and the Methods of Hardening > 
and Tempering* it, ...... J 
Properties of Blued Steel not generally known, 
On Damascus Steel, ........ 
On do. ........ 
Welding of Cast Steel. By Sir Thomas Frankland, Bart 
On Green Copperas, ........ 
On Inks, .......... 
On Prussian Blue, ........ 
Colcothar : Crocus Martis : Saffron of Mars, 
Dr. Allison’s Patent Spinning* Machine, . . . 
Nutrition of Vegetables concluded, 
Cleall’s Machine for beating out Hemp and Flax Seed, 
W. Bond’s Machine for breaking Hemp, . . 
On Coal Gas, . 
Clegg’s Apparatus for procuring Coal Gas, 
On Mineral Waters, and on the Cumberland and York > 
Springs, ........ 5 
On Foreign Wines, . 
On Homemade Wines, ....... 
To Correspondents, . . v . . « - * 
Page. 
428 
435 
436 
441 
443 
445 
450 
456 
461 
46 ! 
463 
466 
46 7 
470 
472 
474 
482 
495 
504 
i 
