Hygiene and sanitation / by John W. Ritchie and Joseph Caldwell
Contributors: Caldwell, Joseph S. (Joseph Stuart); Hassmann, Carl, 1869-1933, ill
Edition: 1920 revision
Series: New-world health series -- bk. 1-2; New-world health series -- bk. 1-2.
Publisher: World Book Co.
Published: 1925
Place of publication: Yonkers-on-Hudson, N.Y
Language: eng
Subjects: Hygiene; Textbooks
Notes: Cover title.

Each part also issued separately.

Includes bibliographical references and indexes.
Table of contents: title: bk.1.; title: Primer of hygiene : being a simple textbook on personal health and how to keep it  -- John W. Ritchie and Joseph S. Caldwell -- bk.2.; title: Primer of sanitation : being a simple textbook on disease germs and how to fight them -- John W. Ritchie ; illustrated by Karl Hassmann.