Bulletin 110
Wednesday 19 October 2011

Appropriate material wil be referenced in Physics Abstracts

Editorial		1
Announcements		2
Annual Invitation Lecture: Collectioning Challenges for the future	Liba Taub	5
Letters to the Editor		13
The Early Development of the Davis Quadrant	Nicolas de Hilster	14
Culpeper's Cylinders: his Optical Compendia circa 1700-35	Stuart Talbot, FRAS	23
Measuring Radioactivity in the Early Twentieth Century	Arend C.R. Ketelaar	28
The supercritical State with application to drying and Manufacture of "Aerogel"	Allan Mills	30
Call for Papers		34
Beginners' Page: A brief History of the Microscope	John Lawrence	35
The Astronomer in the Well	Peter de Clercq	38
Current and Future Events		41
Report of the Tour of Instruments in the Mineralogy Department of the Natural History Museum of London on 23rd July	Neil Handley	42
Note on the Mafra Meridiana	C. Marciano da Silva	43