— Mills and Millwork. 1 vol. 8vo. 25s.
Forbes’ Lectures on Electricity. Crown 8vo. 5s.
Galloway’s Principles of Chemistry Practically Taught. Crown 8vo. 6s. 6d.
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Grove’s Correlation of Physical Forces. 8vo. 15s.
Haughton’s Six Lectures on Physical Geography. 8vo. 15s.
Helmholtz on the Sensations of Tone. Royal 8vo. 28s.
Helmholtz’s Lectures on Scientific Subjects. 2 vols. crown 8vo. 7s. 6d. each.
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