¥i CONTENTS. 
Page. 
New site of Printing Designs—Artificial Slates, - - 191 
Porosity of Glass, &c. —Metallic Titanium—Congelation of 
New Electro Magnetic’ Experiments —Employments of Po- 
tatoes in Steam-Engine boiler 3 
New Tests of Alkalis and Acids—Colouring Mom Crystals 
—Green oe of Uranium 
Prussian Trav. re—Electro-Magnetic “apparatus —Com- | 
__ pression of Water, - 195 
Superior Green Dye, - - 2. -"  - 196 
Artificial Formation of Formic Acid. - — - 
197 
Brunel’s Saw—Soc. of Nat. scrtngy’ Frinte—P ortogaly 198 
me and Infection— ction—Public a ay 8 sen 
oting ies i As mtruction, 
mo oe 5 
5 a . a Literature and Bina, prepped iy 
Ores oe Mine’ ése, - - + - es. 
M. Stromeyer’s Analyses, - | - 868 
Philos at Paris for the socemregers at e ‘National Ir 
Past p~Solieriog sheet i iron set $79 
Plumbago in coal-gas retorts-— Analyses of Uraaine,.: - 3880 
Leipsic Fair—Switzerland—Society for the enco ee 
es. St. wall Canin of rans 381 
Is—El n—U versity of Leyden, 382 
“hse. Piechal f Zz Ontinaire, - 383 
Sulphat of Rhubarb, - - - - 385 
cent a Green, - é =] “ ~ . - 386 
neral spring containing lodine— i 
of Gatvakian ” tam 
Peak of Steel b soft iron ali cavelnite, - . - 390 
making sheet lead, - 391 
Willie 1 lute— _ recin gas apparatus—Method of discover- oe 
ing very — 
- dgganaate Mercury, - 392 
at : ¢; 
+3 
