Title supplied.

RF photo #25222a.

RF photo #25222a.

Reverse: "Erecting 200" telescope at Palomar. Looking from the south-end of the yoke up through the telescope. The telescope tube is not yet in place." Used in '46 RF Annual report, p. 155. Rights: Wide World Photos, Inc. RF #22188B

Caption: "Spraying of lime-sulphur and nicotine sulphate as a treatment for the control of the cattle lice on buffalo." RF photo #21224g.

Caption: "A watermelon saved from injury by the watermelon aphis after a treatment of pyrethrum-kerosene emulsion." RF photo #21224f.

Caption: "Bureau representatives instructing farmers in the application of pyrethrum-kerosene emulsion for the control of the watermelon aphids." RF photo #21224e.

Caption: "Applying a native insecticide to determine effectiveness." RF photo #21224d.

Caption: "Experiment with native insecticides to determine effectiveness in controlling the cabbage leaf beetle." RF photo #21224c.

Caption: "Flowers and leaves of Roy-Kung-Teng, used for insecticides." RF photo #21224b.

Caption: "Leaves and fruit of the bitter tree. The Bureau discovered the effectiveness of this native plant in preparing insecticides." RF photo #21224a.

Caption: "Placin tobacco stems beside rice plants in experimenting with the control of the rice borer." RF photo #21224i.

Caption: "1. Sur. Gen. Godfrey. 2. K.S. Wise, Chief Bacteriologist. 3. Sup. Med Officer. Int. H. Com. 4. Mahangoo, Wealthy East Indian. 5. Beni, East Indian. Our first Patient. 6. L.W. Collins American Consul. 7. J.E.A. Ferguson, Dist. Med. Officer. 8. Dr. Minett. Chief Sanitary Office British Guiana. 9. Assist. To Dr. Minett, Mr. Bell. 10. Viapree & Wajadalli, our East Ind. Microscopists. 12.[illegible] of our force. 13. Officers of Agricola Village. 14. Our first [illegible]. Apr. 6th. 1913. Demerara, British Guiana, South America." RF photo #4388.

Caption: "General view of the harvesting of pyrethrum flowers for the preparation of insecticides." RF photo #21297z.

RF photo #432.

RF photo #22072a