Two heart wheels in gear transmitting a variable velocity ratio, teaching model / J. Schröder, 1868 Two heart wheels in gear transmitting a variable velocity ratio Kinematics 1868
Model showing by wire hyperboloidal pitch surfaces of skew level wheels. Model showing by wire hyperboloidal pitch surfaces Kinematics c. 1889
Complete set of cardboard models of second order surfaces in original packing by L. Brill of Darnstadt Mathematics c.1900
Wooden model, scale 1:2, of axle box for rolling stock Wooden model, scale 1:2, of axle box for rolling stock Railway Models 1888
Bottle of magnesium peroxide, in original carton, supplied by H.R.Napp, Ltd. of London Bottle of magnesium peroxide Materia Medica & Pharmacology
Model of a mangle wheel with varying velocity Model; mangle wheel with varying velocity Kinematics 1890
Model, of Secret Mortice and Tenon carpentry joint, combined with a Mitre carpentry joint, joining three beech-wood blocks: stamped with ‘60’ and ‘67’; over-laid in ink and pencil-marked with ‘67’, by Polytechnisches Arbeits-Institut J. Schröder Atkiens-Gesselleschaft, Darmstadt, Hesse, Germany, 1868 Model, of Secret Mortice and Tenon, combined with a Mitre carpentry joint Building Construction 1868
Model of mangle wheel and pinion (made by Schroder) Model of mangle wheel and pinion (made by Schröder) Kinematics 1883
Model, of Dovetail Scarf carpentry joint, with round peg fitted, joining two beech-wood blocks: stamped with ‘5’, by Polytechnisches Arbeits-Institut J. Schröder Atkiens-Gesselleschaft, Darmstadt, Hesse, Germany, 1868 Model, of Dovetail Scarf carpentry joint Building Construction 1868
Model, of Secret Mortice and Tennon carpentry joint, joining two beech-wood blocks: stamped with ‘58’, by Polytechnisches Arbeits-Institut J. Schröder Atkiens-Gesselleschaft, Darmstadt, Hesse, Germany, 1868 Model, of Secret Mortice and Tennon carpentry joint Building Construction 1868
Model, of Triple-Notched Secret Mortice and Tenon carpentry joint, with two round pegs fitted, joining two beech-wood blocks: stamped with ‘64’ and over-laid in ink, by Polytechnisches Arbeits-Institut J. Schröder Atkiens-Gesselleschaft, Darmstadt, Hesse, Germany, 1868 Model, of Triple-Notched Secret Mortice and Tenon carpentry joint Building Construction 1868
Model, of Half-Lap Scarf carpentry joint, with round peg fitted, joining two beech-wood blocks: stamped with ‘3’, by Polytechnisches Arbeits-Institut J. Schröder Atkiens-Gesselleschaft, Darmstadt, Hesse, Germany, 1868 Model, of Half-Lap Scarf carpentry joint Building Construction 1868
Model, of Stop-Splayed Scarf carpentry joint, with round peg fitted, joining two beech-wood blocks: stamped with ‘7’, by Polytechnisches Arbeits-Institut J. Schröder Atkiens-Gesselleschaft, Darmstadt, Hesse, Germany, 1868 Model, of Stop-Splayed Scarf carpentry joint Building Construction 1868
Model, of Housing ‘Socket’ (channel) carpentry joint, on single beech-wood block: stamped with ‘41’ on reverse, by Polytechnisches Arbeits-Institut J. Schröder Atkiens-Gesselleschaft, Darmstadt, Hesse, Germany, 1868. This was constructed to fit (1868-31/25) Model, of Stopped Housing ‘Pin’ (channel filler) carpentry joint, on single beech-wood block: stamped with ‘41’, by Polytechnisches Arbeits-Institut J. Schröder Atkiens-Gesselleschaft, Darmstadt, Hesse, Germany, 1868’. Model, of Stopped Housing ‘Socket’ (channel) carpentry joint Building Construction 1868
Model, of Tenoned Scarf carpentry joint, with central wedge fitted, joining two beech-wood blocks: stamped with ‘17’, by Polytechnisches Arbeits-Institut J. Schröder Atkiens-Gesselleschaft, Darmstadt, Hesse, Germany, 1868 Model, of Tenoned Scarf carpentry joint Building Construction 1868
Model, of Stopped Housing ‘Pin’ carpentry joint, with bevelled leading edge, on single beech-wood block: stamped with ‘46’, by Polytechnisches Arbeits-Institut J. Schröder Atkiens-Gesselleschaft, Darmstadt, Hesse, Germany, 1868. This was constructed to fit with (1868-31/18) Model, of Stopped Housing ‘Pin’ carpentry joint, with bevelled leading edge, on single beech-wood block: stamped with ‘46’, by Polytechnisches Arbeits-Institut J. Schröder Atkiens-Gesselleschaft, Darmstadt, Hesse, Germany, 1868. Model, of Stopped Housing ‘Pin’ carpentry joint Building Construction 1868
Model, of Tabled Scarf carpentry joint with centre wedge fitted, joining two radiused beech-wood blocks: written in ink with ‘69’, by Polytechnisches Arbeits-Institut J. Schröder Atkiens-Gesselleschaft, Darmstadt, Hesse, Germany, 1868 Model, of Tabled Scarf carpentry joint with centre wedge fitted Building Construction 1868
Model, showing Scribing marking, preparation for Oblique carpentry joint, on single beech-wood block: stamped with ‘2’, by Polytechnisches Arbeits-Institut J. Schröder Atkiens-Gesselleschaft, Darmstadt, Hesse, Germany, 1868 Model, showing Scribing marking Building Construction 1868
Model, of Mitre carpentry joint, with pencil marks for Dovetail Housing carpentry joint, on single beech-wood block: stamped with ‘24’, by Polytechnisches Arbeits-Institut J. Schröder Atkiens-Gesselleschaft, Darmstadt, Hesse, Germany, 1868. This was constructed to fit with (1868-31/30) Model, of Mitre carpentry joint, with pencil marks for Dovetail Housing carpentry joint, on single beech-wood block: stamped with ‘24’, by Polytechnisches Arbeits-Institut J. Schröder Atkiens-Gesselleschaft, Darmstadt, Hesse, Germany, 1868. Model, of Mitre carpentry joint Building Construction 1868
Aloin puriss. Ph. Brit. A sample chemical from Edward Schunck's work on natural dyes and plant products, 1840s-1900. Prepared by E. Merek, Darmstadt, Germany. Aloin, a sample chemical Scientific Instruments & Research 1840s-1900
Cardboard box, containing twelve ampoules of morphine hydrochloride, by E Merck, Darmstadt, Germany, possibly for the French and Turkish, 1900 to 1918 Cardboard box Therapeutics 1900-1918
Model, of Dovetail-Halving ‘Tail’ carpentry joint, on single beech-wood block: stamped with ‘38’, by Polytechnisches Arbeits-Institut J. Schröder Atkiens-Gesselleschaft, Darmstadt, Hesse, Germany, 1868. This was constructed to fit with (1868-31/49) Model, of Dovetail-Halving carpentry joint ‘Socket’, on single beech-wood block: stamped with ‘38’, by Polytechnisches Arbeits-Institut J. Schröder Atkiens-Gesselleschaft, Darmstadt, Hesse, Germany, 1868. Model, of Dovetail-Halving ‘Tail’ carpentry joint Building Construction 1868
Model, of Oblique Secret Mortice and Tenon carpentry joint, with round peg fitted, joining two beech-wood blocks: stamped with ‘51’, by Polytechnisches Arbeits-Institut J. Schröder Atkiens-Gesselleschaft, Darmstadt, Hesse, Germany, 1868 Model, of Oblique Secret Mortice and Tenon carpentry joint Building Construction 1868
Model, of Dovetail and Tabled Scarf carpentry joint, joining two beech-wood blocks: stamped with ‘14’, by Polytechnisches Arbeits-Institut J. Schröder Atkiens-Gesselleschaft, Darmstadt, Hesse, Germany, 1868 Model, of Dovetail and Tabled Scarf carpentry joint Building Construction 1868
Model, of Secret Mortice and Tenon carpentry joint, with a round peg fitted, joining two beech-wood blocks: both stamped with ‘40’; ‘49’; ‘60’; and ‘65’, by Polytechnisches Arbeits-Institut J. Schröder Atkiens-Gesselleschaft, Darmstadt, Hesse, Germany, 1868 Model, of Secret Mortice and Tenon carpentry joint Building Construction 1868
Model, of Dovetail Cross-Lap ‘Tail’ carpentry joint, with only one shouldered side, on single beech-wood block: stamped with ‘36’, by Polytechnisches Arbeits-Institut J. Schröder Atkiens-Gesselleschaft, Darmstadt, Hesse, Germany, 1868. This was constructed to fit (1868-31/40) Model, of Dovetail Cross-Lap ‘Socket’ carpentry joint, with only one shouldered side, on single beech-wood block: stamped with ‘36’, by Polytechnisches Arbeits-Institut J. Schröder Atkiens-Gesselleschaft, Darmstadt, Hesse, Germany, 1868. Model, of Dovetail Cross-Lap ‘Tail’ carpentry joint Building Construction 1868
Model, of Bevel-Lap carpentry joint, with a central round peg fitted, joining two beech-wood blocks: stamped with ‘28’, by Polytechnisches Arbeits-Institut J. Schröder Atkiens-Gesselleschaft, Darmstadt, Hesse, Germany, 1868 Model, of Bevel-Lap carpentry joint Building Construction 1868
Model, of Oblique Dovetail Halving carpentry joint, joining two beech-wood blocks: stamped with ‘43’ on block with Dovetail ‘Socket’; and stamped, plus written in ink with ‘43’ on block with Dovetail ‘Tail’, by Polytechnisches Arbeits-Institut J. Schröder Atkiens-Gesselleschaft, Darmstadt, Hesse, Germany, 1868 Model, of Oblique Dovetail Halving carpentry joint Building Construction 1868
Model, of Tabled Scarf carpentry joint, joining two beech-wood blocks: stamped with ‘6’, by Polytechnisches Arbeits-Institut J. Schröder Atkiens-Gesselleschaft, Darmstadt, Hesse, Germany, 1868 Model, of Tabled Scarf carpentry joint Building Construction 1868
Model, of Oblique Dovetail Halving carpentry joint, with round peg fitted, joining two beech-wood blocks: stamped with ‘53’, by Polytechnisches Arbeits-Institut J. Schröder Atkiens-Gesselleschaft, Darmstadt, Hesse, Germany, 1868 Model, of Oblique Dovetail Halving carpentry joint Building Construction 1868
Model, of Under-Squinted and Tabled Scarf carpentry joint, with centre wedge fitted, joining two beech-wood blocks: stamped with ‘19’, by Polytechnisches Arbeits-Institut J. Schröder Atkiens-Gesselleschaft, Darmstadt, Hesse, Germany, 1868 Model, of Under-Squinted and Tabled Scarf carpentry joint Building Construction 1868
Model of reversing motion by clutch and bevel wheels, teaching model / J Schröder, Germany, 1868 Model of reversing motion by clutch and bevel wheels Kinematics 1868
Model, of Cross-Half Secret Bridle ‘Pin’ carpentry joint, on single beech-wood block: stamped with ‘32’, by Polytechnisches Arbeits-Institut J. Schröder Atkiens-Gesselleschaft, Darmstadt, Hesse, Germany, 1868 Model, of Cross-Half Secret Bridle ‘Pin’ carpentry joint Building Construction 1868
Model, of Under-Squinted Tabled Scarf with ‘V’ ends carpentry joint and centre wedge fitted, joining two beech-wood blocks: stamped with ‘22’, by Polytechnisches Arbeits-Institut J. Schröder Atkiens-Gesselleschaft, Darmstadt, Hesse, Germany, 1868 Model, of Under-Squinted Tabled Scarf with ‘V’ ends carpentry joint and centre wedge fitted Building Construction 1868
Model, of Scribing, preparation for Square carpentry joint, on single beech-wood block: stamped with ‘1’, by Polytechnisches Arbeits-Institut J. Schröder Atkiens-Gesselleschaft, Darmstadt, Hesse, Germany, 1868 Model of Scribing, preparation for carpentry joint Building Construction 1868
Model, of Corner Half-Lap, with Secret Dovetail carpentry joint, on single beech-wood block: stamped with ‘29’, by Polytechnisches Arbeits-Institut J. Schröder Atkiens-Gesselleschaft, Darmstadt, Hesse, Germany, 1868. This was constructed to fit (1868-31/66) Model, of Corner Half-Lap, with Secret Dovetail carpentry joint, on single beech-wood block: stamped with ‘29’, by Polytechnisches Arbeits-Institut J. Schröder Atkiens-Gesselleschaft, Darmstadt, Hesse, Germany, 1868. Model, of Corner Half-Lap Building Construction 1868
Model, of Cross-Lap, combined with Secret Bridle carpentry joint, joining two beech-wood blocks: stamped and over-laid in ink with ‘57’, by Polytechnisches Arbeits-Institut J. Schröder Atkiens-Gesselleschaft, Darmstadt, Hesse, Germany, 1868 Model, of Cross-Lap Building Construction 1868
Juglandin. A sample chemical from Edward Schunck's work on natural dyes and plant products, 1840s-1900. Prepared by E. Merek, Darmstadt, Germany. Juglandin, a sample chemical Scientific Instruments & Research 1840s-1900
Model, of Bridle and Secret Halving carpentry joint, with two round pegs fitted, joining three beech-wood blocks: stamped and over-laid in ink with ‘65’, by Polytechnisches Arbeits-Institut J. Schröder Atkiens-Gesselleschaft, Darmstadt, Hesse, Germany, 1868 Model, of Bridle and Secret Halving carpentry joint Building Construction 1868
Model, of Stopped Housing carpentry joint, with Oblique leading edge, joining two beech-wood blocks: stamped with ‘47’, by Polytechnisches Arbeits-Institut J. Schröder Atkiens-Gesselleschaft, Darmstadt, Hesse, Germany, 1868 Model, of Stopped Housing carpentry joint Building Construction 1868
Model, of Dovetail carpentry joint, joining two beech-wood blocks: stamped with ‘30’, by Polytechnisches Arbeits-Institut J. Schröder Atkiens-Gesselleschaft, Darmstadt, Hesse, Germany, 1868 Model, of Dovetail carpentry joint Building Construction 1868
