Free and Discounted Ebooks
Join 150,000 readers! Get our ebook deals straight to your inbox.

Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 6

Celtes, Konrad to Ceramics

Cover image for

Download


Author: Various Authors
Published: 1911
Language: English
Wordcount: 146,994 / 467 pg
Flesch-Kincaid Reading Ease: 68.6
LoC Category: AE
Downloads: 1,046
Added to site: 2010.07.31
mnybks.net#: 28585
Origin: gutenberg.org
Genre: Reference
Excerpt

would serve a similar end. Among those who experimented in this direction was Joseph Aspdin, of Leeds, who added clay to finely ground limestone, calcined the mixture, and ground the product, which he called Portland cement. The only connexion between Portland cement and the place Portland is that the cement when set somewhat resembles Portland stone in colour. True, it is possible to manufacture Portland cement from Portland stone (after adding a suitable quantity of clay), but this is merely because Portland stone is substantially carbonate of lime; any other limestone would serve equally well. Although Portland cement is later in date than either Roman cement or hydraulic lime, yet on account of its greater industrial importance, and of the fact that, being an artificial product, it is of approximately uniform composition and properties, it may conveniently be treated of first. The greater part of the Portland cement made in England is manufactured on the Thames and Medway. The materials are chalk and Medw

SUBSCRIBE TO MANYBOOKS 

FREE EBOOKS 

Join 150,000+ fellow readers! Get Free eBooks and book bargains from ManyBooks in your inbox. 

We respect your email privacy

(advanced)
login | register

User ID

Password

reset password

Author of the Day

Simon Clark
Simon Clark lives in Doncaster, South Yorkshire and his stories have been published in Darklands 2, Dark Voices 5 and The Year's Best Horror Stories. His work has been broadcast on BBC Radio 4 and he has also written some prose for U2. In his latest horror novel, Vampyrrhic, Clark brought horrific viking warriors from long ago to the shores of England in the form of undead vampires. As our Author of the Day, he tells us all about it.
Read full interview...