A treatise on optics,

"The present work may be regarded as a new edition of the Treatise on optics by the Rev. W.N. Griffin."--Pref. to the first edition.

Wild life on the Rockies,

Partly printed from various periodicals.

Reconstruction, political and economic, 1865-1877,

"Critical essay on authorities": p. [342]-357.

The new archeological discoveries and their bearing upon the New Testament and upon the life and times of the primitive church,

Mode of access: Internet.

The Rocky Mountain wonderland /

Reprinted, in part, from various periodicals.

The child's world readers manual,

Mode of access: Internet.

Idle days in Patagonia,

"The greatest part of the chapter on 'Sight in savages' appeared originally in Longman's magazine; the chapter entitled 'The plains of Patagonia' is reprinted, with but little alteration, from the Universal review. Of the other twelve chapters contained in this work, six are based on papers which have appeared in various periodicals."

A treatise on plane and spherical trigonometry.

Mode of access: Internet.

Abstract of lectures on chemistry.

Mode of access: Internet.

Green mansions; a romance of the tropical forest,

Mode of access: Internet.

Byerly's Chauvenet's geometry /

Mode of access: Internet.

Legendary islands of the Atlantic; a study in medieval geography,

Several chapters are reprinted, with modifications, from the Geographical review.

A history of Marlboro County : with traditions and sketches of numerous families /

Completed by his son, W.E. Thomas.

The religion of science,

Mode of access: Internet.

Far away and long ago; a history of my early life.

Mode of access: Internet.