SCRIBNER'S LUMBER & LOG BOOK 1888

[Electric Comet]

interesting book and fun to read

SCRIBNER'S LUMBER & LOG BOOK

FOR SHIP AND BOAT BUILDERS, LUMBER MERCHANTS, SAW-MILL MEN, FARMERS AND MECHANICS. BEING A CORRECT MEASUREMENT OF SCANTLING, BOARDS, PLANK, CUBICAL CONTENTS OF SQUARE AND ROUND TIMBER,

one of my favorite from the front pages

"Among the vast number of recommendations of this book which we have received from time to time, we think it unnecessary to insert any here, as the book is too well known to require their publication. The popularity of the book is seen by its immense sales. "

[Electric Comet]

complete this sentence

"Hard wood stumps decay in five to six years; spruce stumps decay in about the same time; hemlock stumps in eight to nine years; cedar eight to nine years; pine stumps,_______________"

[Electric Comet]

boil wooden pulleys in olive oil for eight minutes to make them as hard as copper after they dry

[Leon]

Well depending on the wood, that could either make them harder or sifter. Copper is pretty soft.

[Puckdropper]

Electric Comet wrote in news:mqu59u$9em$1 @dont-email.me:

even the most dilligent researcher.

:-)

Puckdropper

[Leon]

Southern Yellow or White Pine?

[Electric Comet]

the answer is never

the book is a fun read i like the instructions on how to measure height of a tree

[Electric Comet]

another interesting one they provide a table of circular saw speeds

formula for determining the rpm of the rim of a circular saw blade

9000/((2*Pi*r)/12)

it is pretty close for my 7 1/4 skilsaw which is rated at 5300 noload rpm the formula gives 4741 rpm

[Leon]

I had to dig into this.. ;~)

I'll assume that 9000 feet per minute is the "ideal" linear speed for cutting wood. Basically a tad over 100 mph. And that the formula is to determine how fast the any sized blade needs to turn to cut at the ideal speed. FWIW RPM at the rim is the same as it is at the arbor. I think you probably meant to RPM of the blade so that the rim speed is correct.

I use a slightly simpler formula. 9000/((3.14*d)/12)