Formule pour connaître la pression du vent sur la surface d'un ballon ...
Scaled diagram shows inventor Annibal Ardisson's formula for determining how the pressure of the wind on the surface of the balloon determines the force and speed required to achieve balloon flight. (Source: A.... More
Carte générale du territoire d'Orléans comprenant aussi la Floride Occ...
Relief shown by form lines. Depths shown by contours and soundings. Map in 4 sections mounted on cloth backing. Available also through the Library of Congress Web site as a raster image. Includes text. Copy 1 b... More
Vous aussi faites votre devoir : avec toutes vos ressources souscrivez...
Peasant couple in field. Man is ploughing and the woman is holding a baby and a rifle. Translation of title: Do your duty : subscribe to the Loan with all of your resources. Signed: B. Chavannaz. Promotional g... More
Emprunt de la Défense Nationale - eux aussi! Font leur devoir
Wounded soldier in foreground. Civilians in line at a cashier's window in background. The National Defense Loan was the first defense loan of the war. This loan realized 13 million francs. Translation of tit... More
Le nouveau Mexique, appelé aussi Nouvelle Grenade et Marata, avec part...
Relief shown pictorially. Has watermarks. "Avec privilege du Roy, 168." Wheat, C.I. Mapping of the transmississippi West, 66 Available also through the Library of Congress Web site as a raster image. Includes "... More
Nouvelle forme de globe aërostatique. Au centre duquel est adapté pour...
Design drawing shows front and side elevations and plan of balloon with devices designed to facilitate navigation and maneuverability while in the air. Tissandier collection.
Aussi [i.e., Australian] soldiers cheering Menzies & Blamey
Photo shows the Matson Photo Service store on first floor of building (formerly the Fast Hotel).
Lt. General Blamey, Mr. Keith Roach & Mr. Riddle, private sect'y [i.e....
Public domain photograph of 1930s Palestine, Israel, free to use, no copyright restrictions image - Picryl description
[Le Nouveau Mexique appele aussi nouvelle grenade et Marata. Auec Part...
Nolin, pub. Available also through the Library of Congress Web site as a raster image.