.jpg?w=1)
Details
An unusual late 19th-Century lacquered-brass binocular microscope, The International,
signed on the foot R & J. BECK LONDON & PHILDELPHIA, numbered 9594, in a mahogany carrying case -- 55cm. (21 5/8in.) high
See Illustrations
The binocular body-tube has rack and pinion adjustment to the two eyepieces, with micrometer fine focusing and a prism to the nosepiece. The body-tube moves via rack and pinion on a shaped limb in which there is a square aperture with screw clamp for stage accessories. The limb is mounted on a vertical circle graduated around the circumference 0-360°. The large circular stage is mounted via a smaller brass disc to the vertical circle; this bears a scale 60°-0-60° and via a straight cut gear and knurled turning knob to the reverse, the stage can be tilted left or right. The stage itself bears a 0-360° circumference scale and can be rotated by means of two ivory handles; the sprung slide holders can be moved back and forth with small brass handles, and additionally through both axes with knurled brass turning knobs. Mounted beneath the stage is a swinging arm diaphragm attachment. Also fixed to the vertical circle is the substage condensor mount; this likewise can be tilted left and right via a separate screw to the reverse, and a roller gear attachment with ivory handle moves both the condensor mount and the vertical circle up and down. The fully adjustable condensor mount is graduated 0-360° around the circumference and has a separate rack and pinion gear for vertical adjustment. Beneath this is mounted the large articulated plano-concave substage mirror. The instrument tilts on an axis between two slightly tapering turned brass columns, with ivory-handled clamp, from a rotating circular base with a 0-360° circumference scale and three splayed feet. There are no objectives or accessories in the case, but included with the lot are: two unassociated bull's-eye condensor lenses, the stand for a third, a SWIFT & SON lamp-holder with bull's-eye condensor (no lamp), and a WATSON & SONS microscope stage with prism eyepiece. The mahogany carrying case has some blue felt lining and three brass carrying handles.
signed on the foot R & J. BECK LONDON & PHILDELPHIA, numbered 9594, in a mahogany carrying case -- 55cm. (21 5/8in.) high
See Illustrations
The binocular body-tube has rack and pinion adjustment to the two eyepieces, with micrometer fine focusing and a prism to the nosepiece. The body-tube moves via rack and pinion on a shaped limb in which there is a square aperture with screw clamp for stage accessories. The limb is mounted on a vertical circle graduated around the circumference 0-360°. The large circular stage is mounted via a smaller brass disc to the vertical circle; this bears a scale 60°-0-60° and via a straight cut gear and knurled turning knob to the reverse, the stage can be tilted left or right. The stage itself bears a 0-360° circumference scale and can be rotated by means of two ivory handles; the sprung slide holders can be moved back and forth with small brass handles, and additionally through both axes with knurled brass turning knobs. Mounted beneath the stage is a swinging arm diaphragm attachment. Also fixed to the vertical circle is the substage condensor mount; this likewise can be tilted left and right via a separate screw to the reverse, and a roller gear attachment with ivory handle moves both the condensor mount and the vertical circle up and down. The fully adjustable condensor mount is graduated 0-360° around the circumference and has a separate rack and pinion gear for vertical adjustment. Beneath this is mounted the large articulated plano-concave substage mirror. The instrument tilts on an axis between two slightly tapering turned brass columns, with ivory-handled clamp, from a rotating circular base with a 0-360° circumference scale and three splayed feet. There are no objectives or accessories in the case, but included with the lot are: two unassociated bull's-eye condensor lenses, the stand for a third, a SWIFT & SON lamp-holder with bull's-eye condensor (no lamp), and a WATSON & SONS microscope stage with prism eyepiece. The mahogany carrying case has some blue felt lining and three brass carrying handles.
Special notice
No VAT will be charged on the hammer price, but VAT at 17.5% will be added to the buyer's premium which is invoiced on a VAT inclusive basis
This lot is subject to Collection and Storage charges