Introduction to general chemistry. A graded course of one hundred lectures with an atlas of eighty plates, representing chemists, institutions, prime materials, crystals, diagrams and apparatus; and illustrations in the text

Mode of access: Internet.

The standard course of lessons and exercises in the tonic sol-fa method of teaching music (Founded on Miss Glover's "Scheme for rendering Psalmody Congregational," 1835) : with additional exercises /

Mode of access: Internet.

Safety code for mechanical power-transmission apparatus : rules for guarding prime movers, intermediate equipment, and driven machines : approved by American Standards Association as an American standard, 1927 /

"ASA B15-1927"--Cover.