Philip Duey conducting a Glee Club recording session (snapshot numbered 31)

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Philip Duey conducting a Glee Club recording session (snapshot numbered 34)

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Philip Duey conducting a Glee Club recording session (snapshot numbered 25)

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Philip Duey conducting a Glee Club recording session (snapshot numbered 32)

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Magnetical instructions for the use of portable instruments adapted for magnetical suverys and portable observatories, and for the use of a set of small instruments adapted for a fixed magnetical observatory;

Mode of access: Internet.

Sources of information on instruments,

Mode of access: Internet.

Queen & co.'s manual of engineers and surveyors instruments. Construction, manipulation, care, theory and adjustments.

"First edition."

A dictionary of chemistry and mineralogy, with an account of the processes employed in many of the most important chemical manufactures. To which are added a description of chemical apparatus, and various useful tables of weights and measures, chemical instruments ... Illustrated with 15 engravings.

The plate is bound in after pl.12, v.2.