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UNUSUAL SLIDE RULE OWNED BY f. J. ROOKER
MAKER UNKNOWN
THE SLIDE RULE IS 20 \" LONG
THE RULE IS ACTUALLY ENGRAVED AND STAMPED WITH INK - YOU CAN SEE THE INDENTATIONS IN THE WOOD.
THE UNUSUAL CURSOR APPEARS TO BE IN TACT AND WORKING (MISSING TWO SMALL SCREWS) AND IS AS IS FROM DATE OF MANUFACTURE
VERY CLEAN, MARKINGS VERY CLEAR
THE ARE A COUPLE OF LARGE SPLINTERS FROM ONE END ONLY OF THE SLIDE RULE
NO OTHER OBVIOUS MARKINGS AS TO THE USE OF THIS SLIDE RULE
THE DATE IS DERIVED FROM THE ONLY MENTION OF f. J. ROOKER AND SLIDE RULES ON THE INTERNET DATES 1906 IN ANARTICLEIN THE uk NATIONAL ARCHIVES
Material: BOXWOOD
Scales: Special
PROVENANCE: THIS SLIDE RULE IS PART OF THE PERSONAL COLLECTION OF THE LATE ASSOCIATE PROFESSOR ALLAN G. BROMLEY, OF THE UNIVERSITY OF SYDNEY. HE WAS REGARDED AS THE WORLD AUTHORITY ON CHARLES BABBAGE\'S CALCULATING ENGINES (INSTIGATING THE BUILDING OF THE DIFFERENCE ENGINE NO.2 AT THE SCIENCE MUSEUM LONDON) AND THE ANTIKYTHERA MECHANISM AND HAD EXTENSIVE KNOWLEDGE OF CALCULATORS, ANALOGUE COMPUTERS, LOGIC, STEREOPSIS, TOTALISATORS, CLOCKS AND TIME KEEPING AND MECHANICAL ENGINEERING.
Weight: 146 gms
THE PHOTOGRAPHS FORM PART OF THE DESCRIPTION
POSTAGE:
FOR DOMESTIC CUSTOMERS, ALL OUR PARCELS/ITEM WILL BE POSTED BY REGULAR POST UNLESS OTHERWISE REQUESTED AND THERE WILL BE AN ADDITIONAL CHARGE.
COMBINED POSTAGE IS PROVIDED.
PAYMENT:
AUSTRALIAN CUSTOMERS
WE ACCEPT PAYMENT BY PAYPAL. LOCAL PICK UP IS WELCOME.
INTERNATIONAL CUSTOMERS
WE ACCEPT PAYMENT BY PAYPAL. WE DO NOT ACCEPT INTERNATIONAL MONEY ORDERS OR US CHECKS.
FREE COLLECTION IS AVAILABLE, CONTACT US FOR DETAILS (SYDNEY) (7 DAYS)
ITEMS CAN BE COLLECTED AFTER THE sale OR SALE IS COMPLETED.
TERMS AND CONDITIONS:
PROMPT PAYMENT IS EXPECTED.
\"BUY IT NOW\" IS PAY NOW BY PAYPAL. CONTACT MUST BE MADE WITHIN 2 DAYS OF THE CLOSE OF sale OR SALE. ALL PAYMENT MUST BE RECEIVED WITHIN 3 DAYS OF CLOSE OF sale OR SALE, UNLESS OTHER ARRANGEMENTS HAVE BEEN MADE.
THE ITEM WILL BE POSTED AS SOON AS MONEY IS RECEIVED AND CLEARED. REGISTERED POST IS AVAILABLE, EMAIL FOR A QUOTE.
ANY QUESTIONS OR PROBLEMS PLEASE CONTACT US.
WE LEAVE response ON EVERY TRANSACTION
A FULL REFUND WILL BE GIVEN IF ITEM IS INCORRECTLY DESCRIBED
WHEN BUYING MULTIPLE ITEMS:
IF YOU HAVE PURCHASED MULTIPLE ITEMS FROM US, PLEASE DO NOT AUTOMATICALLY PAY THE CALCULATED CHARGES PER ITEM, BUT RATHER CONTACT US POST-SALE SO THAT WE CAN CALCULATE THE ACTUAL AND MUCH-REDUCED COST OF THE COMBINED SHIPMENT. IF YOU HAVE PURCHASED AN ITEM FROM US, BUT ARE STILL offerDING OR WISHING TO offer ON OTHER OF OUR ITEMS, PLEASE ADVISE US AND WE WILL DEFER SETTLEMENT ON THE PURCHASED ITEM(S) FOR UP TO TEN DAYS MAXIMUM SO YOU CAN SEE WHETHER YOUR OTHER offer WAS SUCCESSFUL, AND THUS MAKE SIMILAR SAVINGS ON CONSOLIDATED SHIPPING OF THE TWO OR MORE ITEMS. YOU MAY, OF COURSE, ELECT TO SIMPLY PAY FOR EACH ITEM AS PURCHASED WITH ITS INDIVIDUAL POSTAGE/SHIPPING COST.
DRAWER 14