Looking out of town at the outskirts of Zamboanga.

Monday must have been wash day at Zamboanga.

The main street in Zamboanga.

Carabao providing motive power for transportation.

Rural scene a mile out of Jolo.

Palm trees in the vicinity of the constabulary at Jolo.

Children greeting a Coast Survey ship upon its arrival in port and begging for coins to be tossed in the water.

A Moro fisherman casting a net in the southern Philippines.

A Moro sapit, a moderate-sized vessel that could be rowed during periods of calm .

When entering Sandakan Harbor it would seem that it is best to keep this rock on the right hand.

Taking a cool refreshing bath while loading water for the ship from the Mauo River. Henry Healy on left, Charles Pierce on right. Sure hope it wasn't drinking water!

Moro vinta and the pearling fleet in Jolo Harbor.

Native sons of most any barrio.

Natives on Ticul Island.

A night view of the Manila Carnival.

A vinta underway.

Small island off Basilan Island near Portholland.

Station Par on Laparan Island. Note builders on observing platform at top of tower for scale.

Station Us at Usada Island.

An officer's tent at Station Usada. Note all the amenities.

The chow hall at Station Usada.

Station Dat at Dcatabato Island (spelled Databato in other entries).

Tony the cook at a field camp.

A native tribe near Jolo.

Home from market, a Filipina lady balancing her load.

The Chinese pier at Jolo.

"The moaning of the tied", a cartoon pasted on the inside cover of a treatise by Julius Erasmus Hilgard "Lecture On Tides" delivered to the American Institute in 1871. The cartoon was drawn by Frank Hudson, a computer in the computing division.

Cover to "Lecture on Tides" by Julius Erasmus Hilgard, delivered to the American Institute on January 27, 1871.

Collar devices for officers of the United States Coast and Geodetic Survey. In: Changes in Uniform Regulations. [Approved by the Secretary of Commerce June 27, 1917.]

Gold lace sleeve stripes for officers of the USC&GS. In: Changes in Uniform Regulations. [Approved by the Secretary of Commerce June 27, 1917.]

Shoulder loops for officers of the USC&GS. In: Changes in Uniform Regulations. [Approved by the Secretary of Commerce June 27, 1917.]

Belt plate, cap device and other uniform paraphernalia of USC&GS. In: Changes in Uniform Regulations. [Approved by the Secretary of Commerce June 27, 1917.]

Coast and Geodetic Survey nautical exhibit.

Coast and Geodetic Survey geodetic exhibit.

Coast and Geodetic Survey lithographic printing exhibit.

Coast and Geodetic Survey lithographic printing exhibit.

Coast and Geodetic Survey charting exhibit.

Storage of Coast and Geodetic Survey charts prior to distribution.

Exhibit of magnetic instruments and operations.

Lines of equal magnetic declination for the year 1850.

Lines of equal magnetic declination for the year 1875.

Lines of equal magnetic declination and equal annual change for 1935.

Location of magnetic observatories in United States and Pacific Ocean. San Juan , Cheltenham, Tucson, Sitka, and Honolulu were Coast and Geodetic Survey magnetic and seismological observatories.

Galitzin Vertical Component Seismometer and McComb-Romberg tilt compensation seismograph in: Coming to grips with the Earthquake Problem," by Nicholas H. Heck, 1931. Journal of the Franklin Institute, Vol. 212, No. 3, pp. 269-303.

Photographic seismic recorder as illustrated in: "Coming to Grips with the Earthquake Problem," by Nicholas H. Heck, 1931. Journal of the Franklin Institute, Vol. 212, No. 3, pp. 269-303.

Determination of the epicenter of an earthquake by manual means on a globe of the Earth. In: "Coming to grips with the Earthquake Problem," by Nicholas H. Heck, 1931. Journal of the Franklin Institute, Vol. 212, No. 3, pp. 269-303.

Map showing "Known Earthquakes of the United States". In: "Coming to grips with the Earthquake Problem," by Nicholas H. Heck, 1931. Journal of the Franklin Institute, Vol. 212, No. 3, pp. 269-303.

Nautical chart compiler at work. In: "The Coast and Geodetic Survey: Its Products and Services", 1965. 57 pp.

Aeronautical chart compiler at work. In: "The Coast and Geodetic Survey: Its Products and Services", 1965. 57 pp.

Negative engaver working on a nautical chart. In: "The Coast and Geodetic Survey: Its Products and Services", 1965. 57 pp.