Buy Lectures on Mining Delivered at the School of Mines, Paris Volume 1
close menu
Bookswagon
search
My Account
Home > History > Lectures on Mining Delivered at the School of Mines, Paris Volume 1
Lectures on Mining Delivered at the School of Mines, Paris Volume 1

Lectures on Mining Delivered at the School of Mines, Paris Volume 1


     0     
5
4
3
2
1



Out of Stock


Notify me when this book is in stock
X
About the Book

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1876 Excerpt: ...time a very complicated one, which could be simplified with advantage. This may be done for instance by giving up the automatic feed movement during the boring. It is impossible to do without men to look after the working of the machines, and these men may just as well feed the drilling part forwards along a screw, by means of a handle, sufficiently to let the piston always have its full stroke, without striking against the ends of the cylinder. This simplification, analogous to that of which we are have spoken in connection with coal-cutting machines (No. 157), would be particularly useful in an ordinary mine level, where the machines may easily be looked after, because they are necessarily few in number. (164) Numerous perforators have been tried during the last twenty years. We may mention Schwarzkopi'f s machine, in which compressed air acting on a piston drove a sort of hammer against the borer. We have already seen that this system is inferior to the plan of making compressed air act directly on the tool itself. We may also cite Schumann's machine, which was not sufficiently automatic; then the machines of Doering, Bergstrcem, Sachs, Haupt, Crease, Burleigh, etc., etc., in most of which ingenious mechanical movements may be observed. However, it seems to us that too much trouble has been taken, cither to reduce the weight ot the machine so as to facilitate the handling (some machines have been made weighing less than lewt.), or to make it too completely automatic, for this cannot be done without complicating the parts. A very light and at the same time complicated machine is necessarily weak, and requires frequent repairs. We think it is better to make a perforator simple and strong, even if these requirements should cause it to be less easily set up ...


Best Sellers


Product Details
  • ISBN-13: 9781236406507
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 158
  • Spine Width: 9 mm
  • Width: 189 mm
  • ISBN-10: 1236406508
  • Publisher Date: 01 May 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 295 gr

Related Categories

Similar Products

Add Photo
Add Photo

Customer Reviews

REVIEWS      0     
Click Here To Be The First to Review this Product
Lectures on Mining Delivered at the School of Mines, Paris Volume 1
Rarebooksclub.com -
Lectures on Mining Delivered at the School of Mines, Paris Volume 1
Writing guidlines
We want to publish your review, so please:
  • keep your review on the product. Review's that defame author's character will be rejected.
  • Keep your review focused on the product.
  • Avoid writing about customer service. contact us instead if you have issue requiring immediate attention.
  • Refrain from mentioning competitors or the specific price you paid for the product.
  • Do not include any personally identifiable information, such as full names.

Lectures on Mining Delivered at the School of Mines, Paris Volume 1

Required fields are marked with *

Review Title*
Review
    Add Photo Add up to 6 photos
    Would you recommend this product to a friend?
    Tag this Book Read more
    Does your review contain spoilers?
    What type of reader best describes you?
    I agree to the terms & conditions
    You may receive emails regarding this submission. Any emails will include the ability to opt-out of future communications.

    CUSTOMER RATINGS AND REVIEWS AND QUESTIONS AND ANSWERS TERMS OF USE

    These Terms of Use govern your conduct associated with the Customer Ratings and Reviews and/or Questions and Answers service offered by Bookswagon (the "CRR Service").


    By submitting any content to Bookswagon, you guarantee that:
    • You are the sole author and owner of the intellectual property rights in the content;
    • All "moral rights" that you may have in such content have been voluntarily waived by you;
    • All content that you post is accurate;
    • You are at least 13 years old;
    • Use of the content you supply does not violate these Terms of Use and will not cause injury to any person or entity.
    You further agree that you may not submit any content:
    • That is known by you to be false, inaccurate or misleading;
    • That infringes any third party's copyright, patent, trademark, trade secret or other proprietary rights or rights of publicity or privacy;
    • That violates any law, statute, ordinance or regulation (including, but not limited to, those governing, consumer protection, unfair competition, anti-discrimination or false advertising);
    • That is, or may reasonably be considered to be, defamatory, libelous, hateful, racially or religiously biased or offensive, unlawfully threatening or unlawfully harassing to any individual, partnership or corporation;
    • For which you were compensated or granted any consideration by any unapproved third party;
    • That includes any information that references other websites, addresses, email addresses, contact information or phone numbers;
    • That contains any computer viruses, worms or other potentially damaging computer programs or files.
    You agree to indemnify and hold Bookswagon (and its officers, directors, agents, subsidiaries, joint ventures, employees and third-party service providers, including but not limited to Bazaarvoice, Inc.), harmless from all claims, demands, and damages (actual and consequential) of every kind and nature, known and unknown including reasonable attorneys' fees, arising out of a breach of your representations and warranties set forth above, or your violation of any law or the rights of a third party.


    For any content that you submit, you grant Bookswagon a perpetual, irrevocable, royalty-free, transferable right and license to use, copy, modify, delete in its entirety, adapt, publish, translate, create derivative works from and/or sell, transfer, and/or distribute such content and/or incorporate such content into any form, medium or technology throughout the world without compensation to you. Additionally,  Bookswagon may transfer or share any personal information that you submit with its third-party service providers, including but not limited to Bazaarvoice, Inc. in accordance with  Privacy Policy


    All content that you submit may be used at Bookswagon's sole discretion. Bookswagon reserves the right to change, condense, withhold publication, remove or delete any content on Bookswagon's website that Bookswagon deems, in its sole discretion, to violate the content guidelines or any other provision of these Terms of Use.  Bookswagon does not guarantee that you will have any recourse through Bookswagon to edit or delete any content you have submitted. Ratings and written comments are generally posted within two to four business days. However, Bookswagon reserves the right to remove or to refuse to post any submission to the extent authorized by law. You acknowledge that you, not Bookswagon, are responsible for the contents of your submission. None of the content that you submit shall be subject to any obligation of confidence on the part of Bookswagon, its agents, subsidiaries, affiliates, partners or third party service providers (including but not limited to Bazaarvoice, Inc.)and their respective directors, officers and employees.

    Accept

    Fresh on the Shelf


    Inspired by your browsing history


    Your review has been submitted!

    You've already reviewed this product!
    Your IP: 216.73.216.193 IN