1851 Great Exhibition: Official Catalogue: Class X.: J. S. Marratt
From Graces Guide
409. MARRATT, J. S., 63 King William Street, London Bridge.
Five-feet achromatic telescope, the vertical and horizontal motion produced by endless screws.
Seven-inch transit theodolite, reading to 15" in altitude and azimuth, furnished with inverting and diagonal eye pieces, needle box, tripod staff, and locking plate, axis level, etc. It can be used with or without tripod, as may be required; and is adapted for surveying, tunnelling, magnetic, or astronomical purposes.
See Also
Loading...
Sources of Information