The enclosed sample contains 68 kilos and belongs to the lot of 5,000 kilos (11,025 lbs.) that Dr. Cerqueira Pinto holds to be sold in New York. Dr. Cerqueira Pinto’s process is one of coagulation of the latex of the “=Hevea Brasiliensis=” by an ingredient patented by the Brazilian Government—“=LACTINA=”—absolutely free of any acid. The latex after the coagulation is pressed through a cylinder in order to dry out. This rubber was tested and classified as of STANDARD type by the Government of the United States of America. It offers the resistance of 2,010 pounds per square inch according to the experiments made by The Manhattan Rubber Company in July, 1909. This rubber means a saving to the manufacturer of at least 20 per cent, in the opinion of the Favorite Rubber Mfg. Co. of New Jersey and of 25 per cent, as per the analysis made in London. The author of this process calls the Jury’s attention to his rubbers and is willing to furnish with the sufficient quantity in order to prove to the entire satisfaction of his assertions. It vulcanizes as well by acid as by vapor. Dr. Cerqueira Pinto will prepare, during the Exposition, in September, before the public and the manufacturers, his rubbers with both Hevea and Castillôa latexes, yield of the trees in October, 1911, in the Federal Acre, Brazil. He shall present as well a large quantity of similar rubbers cured by the author on different occasions. They are true rubbers of commerce cured for export. They are clothed by a vegetal varnish, soluble in water, which is also a discovery of Dr. Cerqueira Pinto, to prevent the mould. CASTILLÔA OR CAUCHO. Prepared by the process of Dr. Carlos de Cerqueira Pinto. (See the India Rubber World of September 1st, 1909, page 435). The included sample weighs 68 kilos. The author holds 1,400 pounds of this quality to be sold in New York market. The article was cured by rubber laborers of the estate “Iracema” in the Federal Acre, Amazonia, Brazil, during the months of July to December, 1911. They are rubbers of commerce and cured for export. [Illustration: COURTYARD OF THE SETTLEMENT OF THE MESSRS. SUAREZ Y HERMANOS, FILLED WITH RUBBER BISCUITS READY FOR SHIPMENT.] [Illustration: THE TOWN OF HAPURY.] [Illustration: SETTLEMENT OF PORTO AUCAO WITH MULES CARRYING MERCHANDISE TO THE INTERIOR.] [Illustration: SETTLEMENT OF MONTE MO.] [Illustration: SERINGUEIRO CARRYING LATEX.] THE STATE OF MATTO GROSSO [Illustration: BALLS OF RUBBER.] THE STATE OF MATTO GROSSO IN THE THIRD INTERNATIONAL RUBBER EXPOSITION IN NEW YORK, 1912 BY LEOPOLDO DE MATTOS Dr. Joaquim Augusto da Costa Marques, President of the State of Matto Grosso, 1911-1915 The State of Matto Grosso, Brazil, at the Third International Rubber Exposition in New York, 1912