For solid wrought-iron beams, etc., see advertisement. Address Union Iron Mille, Pittsburgh, Pa., for lithograph, etc.
Machinists, boiler makers, tinners, and workers of sheet metals read advertisement of the Parker Power Presses.
Diamond carbon, formed into wedge or other shapes for pointing and edging tools or cutters for drilling and working stone, etc. Send stamp for circular. John Dickinson, 64 Nassau st., New York.
The paper that meets the eye of manufacturers throughout the United States--Boston Bulletin, $4.00 a year. Advertisements 17c. a line.
Winans' boiler powder, 11 Wall st., N.Y., removes Incrustations without injury or foaming; 12 years in use. Beware of Imitations.
ANSWERS TO CORRESPONDENTS.
Correspondents who expect to receive answers to their letters must, in all cases, sign their names. We have a right to know those who seek information from us; besides, as sometimes happens we may prefer to address correspondents by mail.
SPECIAL NOTE.--This column is designed for the general interest and instruction of our readers, not for gratuitous replies to questions of a purely business or personal nature. We will publish such inquiries, however, when paid for as advertisemets at $1.00 a line, under the head of "Business and Personal."