TY  - JOUR
T1  - An Account of a Micrometer Made of Rock Crystal. 
JF  - Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London (1800-1843)
VL  - 2
SP  - 141
EP  - 141
PY  - 1815/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1815.0145
M3  - doi:10.1098/rspl.1815.0145
AU  - Dollond, G.
ER  -