Language Education

Free to read here, from Project Gutenberg.

Latin for Beginners

Benjamin L. D'Ooge

Studien und Plaudereien. First Series

Sigmon M. Stern

German

The Grammar of English Grammars

Goold Brown

A First Spanish Reader

Erwin W. Roessler and Alfred Remy

Spanish

Language: An Introduction to the Study of Speech

Edward Sapir

New Latin Grammar

Charles E. Bennett

An Elementary Spanish Reader

Earl Stanley Harrison

Spanish

An English Grammar

William Malone Baskervill and James Witt Sewell

Modern Spanish Lyrics

E. C. Hills

Spanish

Sign Language Among North American Indians Compared With That Among Other Peoples And Deaf-Mutes

Garrick Mallery, also an audiobook

Het Esperanto in Twintig Lessen

A. Blok

Dutch

English Grammar in Familiar Lectures

Samuel Kirkham

Classic French Course in English

William Cleaver Wilkinson

Higher Lessons in English: A work on English grammar and composition

Alonzo Reed and Brainerd Kellogg

French Conversation and Composition

Harry Vincent Wann

French

A Complete Grammar of Esperanto

Ivy Kellerman Reed

Esperanto

A Middle High German Primer

Joseph Wright

German Science Reader

Charles Frederick Kroeh

German

Graded Lessons in English

Alonzo Reed and Brainerd Kellogg

The Flying Dutchman (Der Fliegende Hollaender): Romantic Opera in Three Acts

Richard Wagner, also an audiobook

German

The Art of Writing & Speaking the English Language

Sherwin Cody

Pitman's Commercial Spanish Grammar (2nd ed.)

C. A. Toledano

Spanish

The Esperanto Teacher: A Simple Course for Non-Grammarians

Helen Fryer, also an audiobook

Esperanto

A Grammar of the English Tongue

Samuel Johnson

Preface to a Dictionary of the English Language

Samuel Johnson, also an audiobook

The English Gipsies and Their Language

Charles Godfrey Leland

International Language, Past, Present & Future

Walter John Clark

Icelandic Primer with Grammar, Notes and Glossary

Henry Sweet

Contes et historiettes à l'usage des jeunes enfants

Zulma Carraud

French

Extracto de la gramatica mutsun

Felipe Arroyo de la Cuesta

Spanish, North American Indian languages

Ritchie's Fabulae Faciles: A First Latin Reader

Francis Ritchie

Latin

On the Evolution of Language

John Wesley Powell

Lectures on Language, as Particularly Connected with English Grammar.

William Stevens Balch

Grammatical Sketch of the Heve Language

Buckingham Smith

Dictionary of the Chinook Jargon, or, Trade Language of Oregon

George Gibbs

Illustration of the Method of Recording Indian Languages

James Owen Dorsey and others

Úplná učebnice mezinárodní řeči dra. Esperanta

František Vladimír Lorenc

Czech, Esperanto

Sketch of Grammar of the Chippeway Languages

John Summerfield

Grammar and Vocabulary of the Lau Language, Solomon Islands

W. G. Ivens