Projective vector algebra; an algebra of vectors independent of the axioms of congruence and of parallels Q Science
Wild flower families; the haunts, characters, and family relationships of the herbaceous wild flowers, with suggestions for their identification Q Science
Wild flowers of the north-eastern states: being three hundred and eight individuals common to the north-eastern United States Q Science
Journal kept by David Douglas during his travels in North America 1823-1827, together with a particular description of thirty-three species of American oaks and eighteen species of Pinus, with appendices containing a list of the plants introduced by Douglas and an account of his death in 1834. Published under the direction of the Royal Horticultural Society Q Science
The secret of the big trees. Yosemite, Sequoia, and General Grant National Parks. Department of the Interior, 1913 Q Science
Manual of the flora of Jackson County, Missouri, by Kenneth K. Mackenzie, assisted by B. F. Bush and others Q Science
