HOW TO MAKE AN INCUBATOR.—
Full directions, illustrated with 7 figures. Also directions for operating the apparatus. Contained in SCIENTIFIC AMERICAN SUPPLEMENT, No. 612. Price 10 cents. To be had at this office and from all news‐dealers.
MINERAL WOOL!
INDESTRUCTIBLE. FIRE‐PROOF. SOUND‐PROOF.
FROST‐PROOF. VERMIN‐PROOF. ODORLESS.
For Deadening, Fire‐Proofing, Insulation of Heat and Cold in Buildings, Prevention of Frost in Water or Gas Pipes.
MINERAL WOOL FIRE PROOF COVERING
(Patented May 29, 1883.)
Also Fire‐Proof Sectional Coverings for Steam Pipes and Boilers. Best non‐conductor for all surfaces, Steam or Fire Heat. Will not Char, Crack, or Burn. Easily applied and removed by any one, and is indorsed by Insurance Companies. For full information and sample free, address
Western Mineral Wool Co.,
Box 123. CLEVELAND, O.