12" Gunter Type Rule

Lot 301 (Photographs, Optical Toys & Science)

English, early 19th Century, stamped C. Blunt No.38 Tavistock St, London, the scale stamped Shots Diamr, Guns Diamr, In Mer, Chords, Latitude, Hours, ... read more

Unusual Brass Rule Engraved with Symbols

Lot 302 (Photographs, Optical Toys & Science)

English, 18th Century, unsigned, with unusual scales and symbols, with one scale engraved 'Fortification'

19th Century Comparative Measures Rule or International Measures Rule

Lot 303 (Photographs, Optical Toys & Science)

English, c.1860, unmarked, the boxwood rule with the Dutch inch along the base  array of international measurements above for comparison with a brass ... read more

Robert Corson Coggeshall Improved Slide Rule

Lot 304 (Photographs, Optical Toys & Science)

English, c.1770, brass plaque embossed 'Robert Corson, Wolverhampton New Inproved Sliding Rule', constructed of box wood with 2 sliding rules, brass ... read more

Unusually Small 6" Guagers Rule, William Lewis

Lot 305 (Photographs, Optical Toys & Science)

English, Late 18th Century, stamped behind the top boxwood slide 'Wm Lewis, Maker, No.52 Bow Lane Cheapside London', the rule with 4 sliders, length ... read more

Unusual 4 Slide Guager Rule, Edward Roberts

Lot 306 (Photographs, Optical Toys & Science)

English, late 18th Century, stamped to the main body behind the slider 'EDWD ROBERTS Maker, Dove Court Old Jewery, LONDON' with scales to all 4 ... read more

Thomas Heath, Brass Sector Rule

Lot 307 (Photographs, Optical Toys & Science)

English, c.1740, engraved in large lettering 'T Heath Fecit', constructed of Brass, engraved on both sides with various linear and non-linear scales, ... read more

18th Century, Boxwood Gunter rule, and other

Lot 308 (Photographs, Optical Toys & Science)

English, late 18th century, stamped 'Navigation Scale Improved By B. Down', the boxwood rule with brass compass points, one side engraved the natural ... read more

2 Ganga Ramm's Patent Slide Rules By Holtzapffel & Co. London

Lot 309 (Photographs, Optical Toys & Science)

English, c.1880, stamped 'Holtzapffel & Co, 64 Charing Cross', the boxwood slide rule with ivory verniers in its original card case with printed ... read more

Financial, Compound Interest Slide Rule, Cary

Lot 310 (Photographs, Optical Toys & Science)

English, mid 19th Century, stamped 'CARY 181 Strand London',  with two logslides, inside scales for Present Worth & Annuity and to the other side  ... read more

Collection of Alcohol related Slide Rules

Lot 311 (Photographs, Optical Toys & Science)

including 2 sliderules for calculating aclohol content of various drinks with brass cursors, a slide rue by J Long London for calculating alcohol ... read more

Collection of 19th Century Slide Rules

Lot 312 (Photographs, Optical Toys & Science)

including a boxwood scale rule to calculate Belt Velocity, Revolutions Per Minute, Diameters of Pullys in Inches, Horse Power and other scales ... read more

A Pair of Evans Paper Makers Rules

Lot 313 (Photographs, Optical Toys & Science)

English, c.1880 Paper Makers boxwood Rule stamped  'ASTON & MANDER ltd Makers 61 Late 25 Old Compton St, London, Paper Makers Rule Designed by ... read more

Late 18th Century Slide Rule

Lot 314 (Photographs, Optical Toys & Science)

English, c.1800, stamped 'BATE LONDON' brass tips with single slide scales stamped GRIT LINE, GRIT and DIAMETER, length 61cm

Boxwood Double Slide Guagers Rule

Lot 315 (Photographs, Optical Toys & Science)

English, c.1800, stamped to the edge 'J STUTSHBURY FECIT DOVE COURT OLD JEWERY LONDON', the rule engraved with scales to only the top face with 2 ... read more

2 Boxwood Double Slide Guagers Rules

Lot 316 (Photographs, Optical Toys & Science)

English, c.1800, stamped to the back 'BUSS 33 HATTON GARDEN LONDON',  the rule engraved with scales to only the top face with 2 boxwood slides, ... read more

A 24" Gaugers Rule, Edward Roberts

Lot 317 (Photographs, Optical Toys & Science)

English, late 18th Century, stamped behind the top boxwood slide 'EDWD ROBERTS Maker Dove Court in Old Jewery LONDON' with 3 boxwood slides two with ... read more

Routledge Engineer’s Rule, & Another Similar

Lot 318 (Photographs, Optical Toys & Science)

English, early 19th Century, stamped along the top edge 'Routledge Engineer’s Rule', constructed of boxwood with logorithmic slide rule to the front, ... read more

A 24" Gaugers Rule, Edward Roberts

Lot 319 (Photographs, Optical Toys & Science)

English, late 18th Century, stamped behind the top boxwood slide 'EDWD ROBERTS Maker Dove Court in Old Jewery LONDON', owners stamp 'JOHN HAYCOCK ... read more

18" Gaugers Rule

Lot 320 (Photographs, Optical Toys & Science)

English, late 18th century, 18" four slide boxwood gaugers rule, stamped behind the top boxwood slide 'EDWD ROBERTS Maker in Dove Court Old Jewery ... read more

3 Sided Gaugers Rule, Dring & Fage

Lot 321 (Photographs, Optical Toys & Science)

English, mid 19th Century, stamped to the side scale 'DRING & FAGE MAKERS TOOLEY ST LONDON'  with scales to 3 slides each with boxwood slide, with ... read more

Three Slide Boxwood Gaugers rule

Lot 322 (Photographs, Optical Toys & Science)

English, late 18th Century unsigned boxwood Gaugers rule, stamped for scales Root, Square Cube, MD, St, Ly, length 30cm

Apparatus, Observation of Fire Slide Rule

Lot 323 (Photographs, Optical Toys & Science)

English, c.1914, engraved to one side 'APP OBS OF FIRE SLIDE RULE MKIII' and the the other side 'J. HICKS 8, 9 & 10 HATTON GARDEN LONDON', the slide ... read more

Textile Slide Rule

Lot 324 (Photographs, Optical Toys & Science)

English, c.1880, stamped 'E. PRESTON & SONS BIRMINGHAM' and 'COMPILED BY JAMES HOLMES M.S.A. BURNLEY', boxwood slide rule with brass engraved slide. ... read more

S. Coulson Engineer, Slide Rule

Lot 325 (Photographs, Optical Toys & Science)

English, c.1830, engraved to one of the brass ends 'Dring & Fage, Makers London' and 'S. Coulson Engineer Redcar', constructed of boxwood with brass ... read more

Four-Sided Gauger's Slide Rule, Edward Roberts

Lot 326 (Photographs, Optical Toys & Science)

English, c.1800, marked behind a slider 'EDWD ROBERTS Maker Dove Court Old Jewery LONDON', constructed of boxwood with 4 pull out scales, marked for ... read more

Hypsometrical Slide Rule

Lot 327 (Photographs, Optical Toys & Science)

English, c.1825, unsigned, constructed of boxwood,  hypsometrical slide rule for determining altitude by thermometric observation, the rectangular ... read more

Hannyngton's Extended Slide Rule

Lot 328 (Photographs, Optical Toys & Science)

English, c.1910, stamped to the rear of the scale 'Designed by Major General Hannington, Aston & Mander Ltd, Makers London' polished wooden baseboard ... read more

Wedgewood's Patent Noctograph

Lot 329 (Photographs, Optical Toys & Science)

English, c.1840, the frame marked in gilt lettering 'WEDGEWOOD'S PATENT NOCTOGRAPH, 9 CORNHILL LONDON', the black leather case opening to reveal a ... read more

18th Century24" Boxwood Sector

Lot 330 (Photographs, Optical Toys & Science)

English, unsigned but dated 1736 to the inside edge, engraved scales for Tan, St, Polygons, Hou, Lat, IDO, Hor, Cho, with scale engraved down the ... read more

Philips Photographic Exposure Meter, Slide Rule

Lot 331 (Photographs, Optical Toys & Science)

English, c.1880, stamped 'PHILLIPS@ EXPOSURE METER PROVY PROTD FALLOWFILED WHOLESALE AGENT', constructed of boxwood with 2 boxwood slides, the slide ... read more

Collection of 7 19th Century Slide Rules

Lot 332 (Photographs, Optical Toys & Science)

including: a 24" boxwood rule stamped 'RAINBRIDGES COLLIERY MANAGERS CALCULATOR', with single boxwood slide and brass cursor; a 8" boxwood rule ... read more

24" Logorithmic Scale Rule, Cole

Lot 333 (Photographs, Optical Toys & Science)

English, 18th Century, stamped to the body behind the boxwood slide 'COLE MAKER at ye ORRERY in FLEET STREET, LONDON', with single boxwood slider to ... read more

Boxwood Folding Railway Engineer’s Rule, Stanley London

Lot 334 (Photographs, Optical Toys & Science)

English, mid 19th Century, stamped 'STANLEY LONDON' with scales for Off Sett, Rad in Chs, Super Elevation, speed in miles per hour, and 66 feet chord, ... read more

S. Coulson Engineer, Slide Rule

Lot 335 (Photographs, Optical Toys & Science)

English, c.1830, engraved to one of the brass ends 'Dring & Fage, Makers London' and 'S. Coulson Engineer Redcar', constructed of boxwood with brass ... read more

18th Century Italian Brass Sector

Lot 336 (Photographs, Optical Toys & Science)

Italian, dated 1739, engraved 'Dominicus Lusuery F. Rome 1739' with scales to the front engraved Figurarum Regularium, Solidorum, Partium AEqualium, ... read more

9" Brass Sector, B. Scott

Lot 337 (Photographs, Optical Toys & Science)

English, c.1720, engraved 'B. Scott, Fecit', brass sector, scales to both sides engraved Tw, Pol, Cho & Lin, 9" length opened

Collection of Early Slide-Ruler Related Books

Lot 338 (Photographs, Optical Toys & Science)

Including: 'The Carpenters Rule Made Easy or the Art of Measuring Superfices and Solds, 8th edd, Thomas Haselden, 1727. 'The Art of Practical ... read more

Carver, Issac, William and Mary period Ivory Gauger Rule

Lot 339 (Photographs, Optical Toys & Science)

English, dated 1689, signed ‘ISSAC CARVER fecit 1689’, constructed of ivory with scales to all 4 sides, with 2 ivory slides with scales engraved to ... read more

Friedrich Krantz, A Large & Exceptional Collection of Crystal Models

Lot 340 (Photographs, Optical Toys & Science)

German, c.1880, many with lables for 'Dr. F. Krantz' each with a number, the models constructed of glass held together with black gummed paper, with ... read more

Friedrich Krantz, A Large & Exceptional Collection of Crystal Models

Lot 341 (Photographs, Optical Toys & Science)

German, c.1880, many with lables for 'Dr. F. Krantz' each with a number, the models constructed of glass held together with black gummed paper, with ... read more

A Quartz Spectrograph Camera, by Hilger, London

Lot 342 (Photographs, Optical Toys & Science)

English, c.1900, unsigned but by Adam Hilger, French polished mahogany body with lacquered brass fittings, with internal prisms, with single ... read more

The Life of Sir William Crookes, Signed Copy

Lot 343 (Photographs, Optical Toys & Science)

The Life of Sir William Crookes O.M., F.R.S. By E.E. Fournier D'Albe, D.Sc., F. Inst. P. with a forword by Sir Oliver Lodge, First Ed, Published 1923, ... read more

William Crookes & John Spiller Manuscript Letters

Lot 344 (Photographs, Optical Toys & Science)

A collection of 5 manuscript letters from William Crookes to John Spiller with one letter From Ellen Crookes, William Crookes wife again to John ... read more

William Crookes & John Spiller, Photograph & Documents

Lot 345 (Photographs, Optical Toys & Science)

including a Carte De Visite of Wiliiam Crookes with manuscript to the back 'John Spiller from his friend William Crookes July 1863, a typed letter ... read more

William Crookes & John Spiller, Collotype Photograph & Obituary

Lot 346 (Photographs, Optical Toys & Science)

a copy of the obituary of Sir William Crookes dated April 1911 from the British Journal of Photography with a reproduced image of a collotype ... read more

A Laboratory Arc Lamp by Cox

Lot 347 (Photographs, Optical Toys & Science)

nglish, c. 1880, signed on a plaque to the base F. J. Cox, 26 Ludgate Hill, London, standing on a French polished circular base with lacquered brass ... read more

Adam, G., An Early D'Arsonval Galvanometer

Lot 348 (Photographs, Optical Toys & Science)

French, c.1880, engraved to a brass plaque: 1 pour un volt 1 pour 1/10 de milli amper G. ADAM Constructeur 9 RUE BLAINVILLE Paris the galvanometer ... read more

German 19th Century Egg Pattern Globe

Lot 349 (Photographs, Optical Toys & Science)

German, late 19th Century, ten printed gores, coloured and lacquered, opens to reveal empty centre, 14cm tall

Bretts's Folding Silk Terrestrial Globe

Lot 350 (Photographs, Optical Toys & Science)

English, c,1890, the cartouch printed 'By the Queens Royal Letters Patent, Betts's New Portable Terrestrial Globe Compiled from the latest and best ... read more