TY  - JOUR
T1  - An Account of a Concave Achromatic Lens, Adapted to the Wired Micrometer, Which Has Been Named Macro-Micro, from Its Power to Increase the Primary Image of a Telescope without Increasing the Diameter of the Wires in the Micrometer. 
JF  - Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London (1800-1843)
VL  - 3
SP  - 267
EP  - 268
PY  - 1830/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1830.0147
M3  - doi:10.1098/rspl.1830.0147
AU  - Dollond, G.
ER  -