Washington.—Claims amounting to nearly $100,000,000 for the discovery of nitrates and guano will be pressed against the Peruvian government, according to provisions of the will of John Celestine Landreau, filed in the District of Columbia Supreme Court. Landreau, who was the brother of Jean Théophile Landreau, French scientist and explorer of New York, who discovered nitrates while on an expedition in South America in 1844, names his grandson, Norman B. Landreau, and Attorney Martin J. McNamara trustees and executors of his estate. Following his discovery, Jean Landreau applied to the government for a reward, granted under laws existing at that time, whereby anyone discovering minerals or metals that would enrich the government were entitled to remuneration. The original claim, according to the heirs, was for $100,000, which finally was recognized by the government in 1865, but never paid. Later the explorer returned to his home in New York to obtain funds for the development of his discovery and to make further explorations in South American countries. Other claims were filed under each administration from the time of President Hayes, and in each instance the Peruvian government acknowledged its indebtedness, but postponed settlement, it is said. It is set forth that the Peruvian government has netted millions in revenue from the development of nitrates deposits, borrowing money from Great Britain to carry on the work. 