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These records cover the period 1899-1918. They consist of unbound notes, lists, drawings, calculations, correspondence, reports, notebooks, and pocket notebooks. The records relate primarily to the design and operations of the cement works at Stewartsville, New Jersey. Included are documents dealing with work assignments, output, and costs. A few items concern the employment of Edison's crushing technologies by other enterprises. Other material pertaining to plant operations can be found in the EPCCo Corporate Files.

Most of the selected items are in Edison's hand or contain substantive notations by him. Some of the unselected documents are initialed by Edison. Among the unselected items are a report by William Simpkin from 1900 concerning the status of work on the crushing plant; documents pertaining to miscellaneous accounts; and lists relating to blueprints.

The records are arranged in four groups: (1) General; (2) Reports; (3) Notebooks; and (4) Pocket Notebooks. Related material can be found in N-99-00-00 (see "Notebooks by Edison" in the Notebook Series).

Records not selected: Plant Operations Reports

Chemical and Physical Laboratory Reports: Raw Materials and Cement (1903)

This folder covers the period October-December 1903. It contains signed reports by chemist Edward P. Dinan. Included is information regarding atmospheric conditions; the moisture content of cement and carbonate rock; and the physical properties of chalk, coal, clinker, and cement. Some of the reports are initialed by Edison.

Inspector's Reports (1903)

This folder covers the periods February-March and September- December 1903. It contains reports and related memoranda concerning engines and other equipment at the Stewartsville works. Most of the reports are signed by Morris D. Jayne; many of the memoranda are initialed by Edison.

Mill Logs (1903)

This folder covers the periods January-March and September- December 1903. It contains typed transcripts of daily mill logs. Most of the documents are initialed by Edison and Walter S. Mallory. Some contain notations in Mallory's hand; a few have calculations that may have been made by Edison.

Chemical and Physical Laboratory Reports: Raw Materials and Cement (1904)

This folder covers the period December 1903-February 1904. It contains reports by chemist Edward P. Dinan, all bearing the notation "Plant not in operation." Some of the items concern atmospheric condition; the moisture content of cement and carbonate rock; and the physical properties of chalk, coal, clinker, and cement. None of the reports are initialed by Edison.

Inspector's Reports (1904)

This folder covers the period February and June 1904. It contains reports by Morris D. Jayne and George G. Lewis. None of the documents are initialed by Edison.

Mill Logs (1905)

This folder covers the period May-December 1905. It contains typed transcripts of daily logs, including running times, indicator readings, and operations at specific plants of the cement works.

General Inspection Reports (1905-1908)

This folder covers the period May 1905-May 1908. Most of the reports pertain to bearings.

Foremen's Reports (1906- 1907)

This folder contains weekly reports of departments at the Stewartsville works. Included are reports by the superintendent, chemist, chief engineer, and master mechanic. There are also reports by the foremen of the quarry, oil, belt, and electrical departments, along with others by the foremen of the crusher, weighing and mixing, roaster, clinker, and packing plants.

Log Reports with Shipment Notes (1907-1918)

This folder contains unsigned daily reports of plant operations, along with notes relating to daily and monthly shipments.

Records not selected: Plant Operations Notebooks

Notebook, N-00-04-18

This notebook is dated April 18, 1900. It was used by an unidentified author to compare estimated and actual costs of sundry items.

Notebooks, N-03-8-18 and N-03-09- 28

These notebooks cover the periods August 1903-February 1906 and September 1903-March 1910. They were used by unidentified authors as logbooks for the daily analysis of cement mixtures. The entries typically note the source quarry, sample analyses, and condition of particular lots. Some entries include calculations of moisture content.

Notebook, N-05-08-16

This notebook covers the period August 1905-May 1908. It was used by an unidentified author for notes, calculations, and drawings regarding sample analyses as well as various cement tests and experiments. A few entries concern rock samples taken by Edison. Some of the notes and calculations relate to the porosity of clinker, the "flash" and "flame" temperatures of cylinder oil, and the treatment of sand briquettes with sodium silicate. There is also a log of data entitled "SO3 in Hourly Grinds."

Notebook, N-06-12-13

This book covers the period December 1906-February 1907. It was used by an unidentified author for notes and calculations pertaining to drilling operations.

Notebook, N-07-09-29

This book covers the period September 1907-July 1908. It was used by an unidentified author to record freight shipments by rail.

Notebooks

These seven notebooks cover the period May 1908-December 1913. They were used by J. G. Hackman and other, mostly unidentified, authors for notes, calculations and drawings. The notebooks pertain to prospecting, sample analyses, and product quality at different stages of the production process. The entries typically note the source quarry or drill hole and the specific kiln or grinding analysis. Some of the entries relate to moisture content.

N-08-05-07 N-08-08-18 N-08-05-22 N-08-11-03

N-09- 08-01 N-10-07-05 N-10-07-17

Notebook, N-00-05-18

This undated notebook was used by an unidentified author to compare estimated and actual costs of sundry items.

Records not selected: Plant Operations Pocket Notebooks

These fifteen books cover the period 1899-1909. They were used by Walter S. Mallory, C. N. Wiley, and other, mostly unidentified, authors. The books contain notes, calculations, and drawings regarding prospecting, sample analyses, and product quality at different stages of the production process. Some of the books pertain to equipment and alterations at the Stewartsville works. One book (PN-01-04-01) concerns the status of drawings and materials relating to mill buildings. Another book (PN-99-00-00.3) contains notes about competitors, estimated costs, potential customers, and other subjects.

PN-99-00-00.1 PN-99-00-00.2 PN-99-00- 00.3 PN-01-04-01 PN-01-05-25 PN-06-05-10

PN-06-08-23 PN-07-00-00.4 PN-07-03-30 PN-07-05-02 PN-07- 10-23 PN-08-10-15 PN-09-07-22 PN-09-07-28 PN-10-00-00.1