Ideas made of brass (and glass)

Large drum microscope by Trécourt and Georges Oberhaeuser, circa 1838. Signed on the drum base "Brevet d'Invention, Trécourt & Georges Oberhaeuser, Place Dauphine № 19 à Paris". Trécourt and Oberhaeuser took out a patent for this 'microscope à tourbillon' in 1837.

Horizontal microscope by Vincent & Charles Chevalier, in contemporary literature referred to as 'microscope d'Amici' (Amici type microscope), end of the year 1830. Signed on the tube "Vincent & C. Chevalier Ing[énieu]rs Opt[icie]ns, Quai de l'horloge № 69 à Paris" and on the tube cradle "CH. CHEVALIER, 154".

Pocket microscope by Charles Chevalier, referred to by the manufacturer as 'microscope diamant', 1834-1849. Signed on the tube "Charles Chevalier, Palais Royal 163, Paris".

Microscope designed by Filippo Pacini and manufactured by Giovanni Battista Amici for George John Warren Vernon, November 1845. When visiting Amici's workshop in Florence, Lord Vernon noticed Pacini's microscope being constructed (at present in the Museo Galileo, Florence) and asked Amici to make a second example.

Portable microscope (microscopio tascabile) by Giovanni Battista Amici, 1850s.

 

 

Pretty couple

The innovation of this model lies in the mechanical coupling of objective and stage, which eliminates the necessity for optical centering.

Circa 1877 petrological microscope by Nachet. Signed on the base: "NACHET ET FILS, 17, rue S[ain]t Séverin, Paris". The analyser was placed at the lower end of the internal tube and difficult to remove. Just above the objective, one finds an intriguing revolver holding different Bertrand lenses, allowing the use of convergent light.

Circa 1879 petrological microscope by Nachet. Signed on the base: "NACHET ET FILS, 17, rue S[ain]t Séverin, Paris". This model represents a slightly improved design allowing the analyser to be freely removed from the tube. An absolutely identical instrument was used by the famous mineralogist Evgraf Stepanovich Fedorov and depicted in his 1893 work 'Теодолитный метод в минералогии и петрографии' (Theodolite method in mineralogy and petrology).

 

 

 

contact by e-mail: Jeroen Meeusen

 

Last update:
August 2nd, 2016