A manual of spherical and practical astronomy : embracing the general problems of spherical astronomy, the special applications to nautical astronomy, and the theory and use of fixed and portable astronomical instruments, with an appendix on the method of least squares.

Mode of access: Internet.

The health index of children,

Bibliography: p. 186-188.

The port of Boston; a study and a solution of the traffic and operating problems of Boston, and its place in the competition of the north Atlantic seaports,

Mode of access: Internet.

Recommendations of the Bureau of Animal Industry on problems of livestock production : prepared for the information of livestock owners, agricultural writers, county agents, livestock specialists, the meat trade, bureau employees and others interested in the betterment of the live stock industry /

Contribution from Bureau of Animal Industry.