Public Domain

Scientific American Volume Xxiv No 12 March 18 1871 A Weekly Jo

*Knots and Splices 175 Influence of Cold on Iron and Steel. 176 Oak Graining in Oil Colors 176 Knots and Splices (Explanation) 177 Hartford Steam Boiler and Insurance Co.'s Report 177 *Improved Spiral Spring for Railway Carriages 178 *Portable Writing and Copying Case 178 How...

Chapters

2. Chapter 2

It is a common practice for grainers to imitate a broad piece of heart or sap of oak, upon the back rail of almost every door they do, and many of them are not even content with...

3. Chapter 3

Sticks are manufactured both from large timber of from two to six feet girth, and from small underwood of about the thickness of a man's thumb. The timber, which is chiefly beec...

4. Chapter 4

Take a piece of firm, close grained charcoal, and, near one end of it, scoop out a cavity about half an inch in diameter and a quarter of an inch in depth. Place in the cavity a...

6. Chapter 6

Why, American engineers have scarcely yet been able to organize themselves into an association for mutual advancement in their profession, much less to give the reading public t...

5. Chapter 5

On hatching out, the worm is of a brimstone yellow, and thinly covered with strong hairs; after the second month it is greenish, with black, longitudinal streaks, and the thread...

8. Chapter 8

Can a round, spring-steel rod be drawn to any desired length, with a true taper to a point, with equal elasticity the whole length, and rolled temper? What is the price per hund...

7. Chapter 7

The voluminous comparison of this engine with those previously exhibited, seems unnecessary, and we think not in good taste in such a report, however much it may possess of scie...

9. Chapter 9

2.--BOILER FURNACE.--I have two boilers, twenty-four feet long and four feet in diameter each, with five ten-inch flues. The fire passes under the boiler, and enters the flues a...

10. Chapter 10

CAST SEAMLESS THIMBLE SKEINS FOR WAGONS.--John Benedict, Kenosha, Wis., administrator of Andrew Leonard, deceased. Letters Patent No. 16,688, dated February 24, 1857; reissue No...

11. Chapter 11

CIRCULAR SAW MILLS. HAYS & NEWMAN'S PATENT DOUBLE PARALLEL EDGERS, FOSTER'S PATENT LOG-CANTING MACHINES, and Sawmill Machinery generally, manufactured by the WASHINGTON MOWING M...

1. Chapter 1

*Knots and Splices 175 Influence of Cold on Iron and Steel. 176 Oak Graining in Oil Colors 176 Knots and Splices (Explanation) 177 Hartford Steam Boiler and Insurance Co.'s Repo...

12. Chapter 12

The Editors are assisted by many of the ablest American and European Writers, and having access to all the leading Scientific and Mechanical Journals of the world, the columns o...