Report from the U.S. Bureau of Mines discussing the anthracite region of Pennsylvania and the efforts to prevent coal-mine drainage into nearby streams. According to the introduction, "The purpose of this report is not to develop a practicable or feasible method or process of treating acid mine water but rather to present available factual and deduced data that may be useful in showing pH range over which the treatment is to take place and the sludge products most likely to be handled" (p. 2).

Report issued by the U.S. Bureau of Mines on the estimates of known reserves of coking coal deposits in Armstrong County, Pennsylvania. The properties of coal and coal blends from the area are presented. The report includes tables and maps.

Report issued by the U.S. Bureau of Mines on the known reserves of coking coal in Fayette County, Pennsylvania. Studies on the properties of coal and coal blends from the area are presented. This report contains tables, and maps.

Report issued by the U.S. Bureau of Mines on the estimate of the known reserves of coking coal in Westmoreland County, Pennsylvania. The report evaluates the properties of coal and coal blends from the area, and includes tables, and maps.

Map that accompanies a report issued by the U.S. Bureau of Mines regarding a buried valley area (a deposit of clay, sand, and gravel) around the Susquehanna River in the anthracite region of Pennsylvania, near the city of Wilkes-Barre. This map indicates the relative positions of mines and other coal storages locations referenced in the report along with flooded regions and underlying coal measurings and workings.

Letter from A. H. Blackshear, Jr. to the Dean's Office of the University of Pennsylvania enclosing a one hundred and twenty-five dollar New York Exchange at the request of Cheng, Tsung-O, who is cc'd.

Handwritten letter from Cheng Tsung-O to H. Kempner requesting a check for two hundred dollars in the immediate future.

Letter from Cheng Tsung-O to Harris L. Kempner thanking him and his family for their hospitality and discussing his new address and time in Philadelphia.

Handwritten letter from Cheng Tsung-O to Harris L. Kempner asking how his trip to Europe was and discussing the cold weather and college and wishing him a happy Thanksgiving.

Letter from D. W. Kempner to Thos. L. James discussing interest in purchasing another Converto Company trailer through James.

Letter from Daniel W. Kempner to Henry A. Dreer, Incorporated discussing an order for a pruning saw from Henry A Dreer's 1948 wholesale catalogue.

Letter from Daniel W. Kempner to Henry A. Dreer, Incorporated asking for certain items.

Letter from Daniel W. Kempner to Henry A. Dreer, Incorporated requesting a bulk order of Wild Phlox and blue Geranium seeds.

Letter from Daniel W. Kempner to J. C. Schmidt discussing an order of Snapdragon seedlings.

Letter from Daniel W. Kempner to J. C. Schmidt discussing an order of Snapdragon seedlings in several colors and Rooted Coleus cuttings and the check to cover it.

Letter from Daniel W. Kempner to Musser Forests Incorporated requesting catalogues for seeds.

Letter from Daniel W. Kempner to Orchid Tree Nurseries inquiring if they have any Italian Cypress seedlings or small trees ready for transplanting that upcoming fall.

Letter from Daniel W. Kempner to Rex Pearce discussing his referral from Mr. Corts of Dreer's to Mr. Pearce in his search for Wild Phlox and Wild Light Blue Geranium seeds in bulk.

Letter from Daniel Webster Kempner to J. C. Schmidt requesting them to send him 100 Colius, 12 varieties rooted cuttings by air express. He enclosed $ 2.00 for that and 25¢ for air express.

Letter from Dreer's to Daniel W. Kempner discussing that they are unable to fulfill Mr. Kempner's order for Wild Phlox or Geranium seeds in bulk and referring him to Rex Pearce.

Letter from Frank E. Dawson to Daniel W. Kempner outlining a route from New York to Galveston, with a first stop in Carlisle, Pennsylvania with instructions to travel along the new turnpike extension, along with a possible stop in Jackson, Mississippi.

Letter from Harris L. Kempner to Cheng Tsung-O discussing a letter received from Shanghai regarding Tsung-O's new address and the response given.

Letter from I. H. Kempner to Alamo Fruit Distributors, Ltd. requesting that they duplicate his order of grapefruit and send them to the enclosed addresses. He makes note that he would only like grapefruit and no oranges.

Letter from I. H. Kempner to Mr. Stuart F. Loucheim appreciating the idea of sending friends a reproduction of the Declaration of Independence while finding inspiration in the symbolism and text of the document.