Student notebook of Marston Cabot, ca. 1720-1735

This leather-bound volume contains excerpts copied by Marston Cabot from books he read while he was a student at Harvard in 1723. The volume includes extracts from Charles Morton's 1687 Compendium Physicae (titled "of Phisicks" by Cabot), Dr. Adriani Heereboord (Adrianus Heereboord), Philosophia Naturalis and Johanne-Henrico Alstedio’s (John Henry Alsted) geometry text Compendium Geometria. The excerpts from Compendium Geometria include both figures and text, primarily in Latin with some Greek. The volume also includes “Theses quaedam extractae potissimum ex Enchiridio Metaphysico Domini Johannis Clerici" a précis of Jean Le Clerc's Ontologia et Pneumatologia made by Jonathan Remington, a Harvard Tutor from 1703 to 1711, to serve in place of printed textbooks. The names Jonathan Jackson and Edward Jackson are written on the inside cover, suggesting the book may have been handed down to Edward Jackson (Class of 1726) and his son Jonathan Jackson (Class of 1761). The text of the volume is in Marston Cabot's hand.

Account book of Andrew Croswell, 1794-1802

Andrew Croswell kept this account book while an undergraduate at Harvard College. It contains entries from 1794, the year he entered, until his graduation in 1798. There is also one entry on the back cover apparently made in 1802. The entries, divided by school term, are very detailed. Croswell indicates the cost of the following, among many other expenses and purchases: transportation, most often to Hingham and Plymouth; payment for "passing the bridge"; candles; hiring a horse; wood and having it cut; laundry; quills and pencils; paper and ink; razors, haircuts, hair ribbons; a trunk; clothing and cloth for trousers; furniture; tickets to the theater; door locks; a bowl and spoon; "batts and balls" and "other necessaries"; tobacco; toothbrushes; shoe and boot repair; fruit; wine, brandy and rum; cheese; coffee and tea; butter; lemons; sugar; and wafers. There are also entries for college-related costs, including the payment of quarter bills, buttery bills, Hasty Pudding Club dues, and a fee to the President of Harvard College related to Croswell's graduation. There are also entries pertaining to the cost of celebrating various special occasions, including Election Day, Christmas Eve, "Independent Day," and George Washington's birthday.

Boston, Massachusetts, 1725 (Raster Image)

This layer is a georeferenced raster image of the historic paper map entitled: The town of Boston in New England, by Capt. John Bonner, aetatis suae 60, 1722 ; engraven and printed by Fra. Dewing. The version imaged here is a 1835 facsimile (published by George G. Smith) of the third state (1725) of the original map published by John Bonner and William Price. Scale [ca. 1:5,600]. Covers Boston proper (Shawmut Peninsula and Boston Neck). The image inside the map neatline is georeferenced to the surface of the earth and fit to the Massachusetts State Plane Coordinate System, Mainland Zone (in Feet) (Fipszone 2001). All map collar and inset information is also available as part of the raster image, including any inset maps, profiles, statistical tables, directories, text, illustrations, or other information associated with the principal map. This map shows features such as roads, wharves, drainage, selected public buildings and residences (including schools and churches) shown pictorially, cemeteries, and more. Relief is shown pictorially. Includes an index to points of interest and chronological lists of "Great Fires" and "Genll. small pox." This layer is part of a selection of digitally scanned and georeferenced historic maps of Massachusetts from the Harvard Map Collection. These maps typically portray both natural and manmade features. The selection represents a range of regions, originators, ground condition dates (1755-1922), scales, and purposes. The digitized selection includes maps of: the state, Massachusetts counties, town surveys, coastal features, real property, parks, cemeteries, railroads, roads, public works projects, etc.

Boston, Massachusetts, 1846 (Raster Image)

This layer is a georeferenced raster image of the historic paper map entitled: Plan of Boston comprising a part of Charlestown and Cambridge, published by George G. Smith, engraver, 1846. Scale [ca. 1:7,310]. Covers Boston proper (Shawmut Peninsula and Boston Neck) with small portions of Charlestown, Cambridge, and South Boston. The image inside the map neatline is georeferenced to the surface of the earth and fit to the Massachusetts State Plane Coordinate System, Mainland Zone (in Feet) (Fipszone 2001). All map collar and inset information is also available as part of the raster image, including any inset maps, profiles, statistical tables, directories, text, illustrations, or other information associated with the principal map. This map shows features such as roads, railroads, wharves, drainage, churches, schools, selected public buildings, parks, cemeteries, city ward boundaries and more. Relief is shown by hachures. Includes insets: Plan of South Boston from a drawing by S.P. Fuller. Scale [ca. 1:17,600] -- Plan of East Boston from actual survey by R.H. Eddy. Scale [ca. 1:17,000]. Includes also indexes to points of interest and streets. This layer is part of a selection of digitally scanned and georeferenced historic maps of Massachusetts from the Harvard Map Collection. These maps typically portray both natural and manmade features. The selection represents a range of regions, originators, ground condition dates (1755-1922), scales, and purposes. The digitized selection includes maps of: the state, Massachusetts counties, town surveys, coastal features, real property, parks, cemeteries, railroads, roads, public works projects, etc.

Boston, Massachusetts, 1851 (Raster Image)

This layer is a georeferenced raster image of the historic paper map entitled: Plan of Boston comprising a part of Charlestown and Cambridge, published by George G. Smith, engraver, 1851. Scale [ca. 1:7,380]. Covers Boston proper (Shawmut Peninsula and Boston Neck) with small portions of Charlestown, Cambridge, and South Boston. The image inside the map neatline is georeferenced to the surface of the earth and fit to the Massachusetts State Plane Coordinate System, Mainland Zone (in Feet) (Fipszone 2001). All map collar and inset information is also available as part of the raster image, including any inset maps, profiles, statistical tables, directories, text, illustrations, or other information associated with the principal map. This map shows features such as roads, railroads, signal stations, wharves, drainage, churches, schools, selected public buildings, parks, cemeteries, city ward boundaries and more. Relief is shown by hachures. Includes insets: Plan of South Boston from a drawing by S.P. Fuller. Scale [ca. 1:17,600] -- Plan of East Boston from actual survey by R.H. Eddy. Scale [ca. 1:17,000]. Includes also indexes to points of interest and streets. This layer is part of a selection of digitally scanned and georeferenced historic maps of Massachusetts from the Harvard Map Collection. These maps typically portray both natural and manmade features. The selection represents a range of regions, originators, ground condition dates (1755-1922), scales, and purposes. The digitized selection includes maps of: the state, Massachusetts counties, town surveys, coastal features, real property, parks, cemeteries, railroads, roads, public works projects, etc.

Boston, Massachusetts, 1835 (Raster Image)

This layer is a georeferenced raster image of the historic paper map entitled: Plan of Boston comprising a part of Charlestown and Cambridge, published by George G. Smith, engraver, 1835. Scale [ca. 1:7,310]. Covers Boston proper (Shawmut Peninsula and Boston Neck) with small portions of Charlestown, Cambridge, and South Boston. The image inside the map neatline is georeferenced to the surface of the earth and fit to the Massachusetts State Plane Coordinate System, Mainland Zone (in Feet) (Fipszone 2001). All map collar and inset information is also available as part of the raster image, including any inset maps, profiles, statistical tables, directories, text, illustrations, or other information associated with the principal map. This map shows features such as roads, railroads, wharves, drainage, churches, schools, selected public buildings, parks, cemeteries, city ward boundaries and more. Relief is shown by hachures. Includes insets: Plan of South Boston from a drawing by S.P. Fuller. Scale [ca. 1:17,600] -- Plan of East Boston from actual survey by R.H. Eddy. Scale [ca. 1:17,000]. This layer is part of a selection of digitally scanned and georeferenced historic maps of Massachusetts from the Harvard Map Collection. These maps typically portray both natural and manmade features. The selection represents a range of regions, originators, ground condition dates (1755-1922), scales, and purposes. The digitized selection includes maps of: the state, Massachusetts counties, town surveys, coastal features, real property, parks, cemeteries, railroads, roads, public works projects, etc.

Benchmarking analogue models of brittle thrust wedges

We performed a quantitative comparison of brittle thrust wedge experiments to evaluate the variability among analogue models and to appraise the reproducibility and limits of model interpretation. Fifteen analogue modeling laboratories participated in this benchmark initiative. Each laboratory received a shipment of the same type of quartz and corundum sand and all laboratories adhered to a stringent model building protocol and used the same type of foil to cover base and sidewalls of the sandbox. Sieve structure, sifting height, filling rate, and details on off-scraping of excess sand followed prescribed procedures. Our analogue benchmark shows that even for simple plane-strain experiments with prescribed stringent model construction techniques, quantitative model results show variability, most notably for surface slope, thrust spacing and number of forward and backthrusts. One of the sources of the variability in model results is related to slight variations in how sand is deposited in the sandbox. Small changes in sifting height, sifting rate, and scraping will result in slightly heterogeneous material bulk densities, which will affect the mechanical properties of the sand, and will result in lateral and vertical differences in peak and boundary friction angles, as well as cohesion values once the model is constructed. Initial variations in basal friction are inferred to play the most important role in causing model variability. Our comparison shows that the human factor plays a decisive role, and even when one modeler repeats the same experiment, quantitative model results still show variability. Our observations highlight the limits of up-scaling quantitative analogue model results to nature or for making comparisons with numerical models. The frictional behavior of sand is highly sensitive to small variations in material state or experimental set-up, and hence, it will remain difficult to scale quantitative results such as number of thrusts, thrust spacing, and pop-up width from model to nature.