View of a worker passing rubber stock through the mixing mill at the Naval Air Experimental Station's Rubber Compounding and Processing Laboratory. At the laboratory, the mill was used to mix rubber stocks or warm mixed…

General view of the Rubber Compounding and Processing Laboratory at the Naval Air Experimental Station's Aeronautical Materials Laboratory. Two workers and an assortment of machinery and scientific apparatus, including…

View of the mixing mill used in the Rubber Compounding and Processing Laboratory at the Naval Air Experimental Station. The mill is an Adamson 6" by 16" two-roll machine powered by a 7 1/2 H.P. motor with chain drive.…

General view of workers testing the features of new hydraulic systems at the Naval Air Material Center's Aeronautical Materials Laboratory. Two workers are seen turning valves on the machinery while a third worker looks…

View of chemist adding unidentified ingredients to rubber stock in the Rubber Compounding and Processing Laboratory at the Naval Air Experimental Station. The primary purpose of the laboratory was the production of…

Color photograph showing two technicians removing a plastic dome from an unidentified machine in the Plastics Laboratory at the Naval Air Engineering Center.

General view of the Rubber Compounding and Processing Laboratory at the Naval Air Experimental Station's Aeronautical Materials Laboratory. Two workers and an assortment of machinery and scientific apparatus, including…

General view of the Rubber Laboratory at the National Air Engineering Center's Aeronautical Materials Laboratory. At left, Technician Armand Rindone operates an unidentified machine before a group of observers. The…

General view of an autoclave, used for the fabrication of plastics, at the Naval Air Engineering Center's Aeronautical Materials Laboratory. In the foreground, Laboratory Technical Director J. Hartley Bowen, Jr.…

Eleanor Vadala, chemist, demonstrating use of the Gammacell 220, a textile chemistry machine, at the Naval Air Material Center's Aerospace Materials Laboratory. The Gammacell 220 is a source of Cobalt-60 gamma…

General view of the rubber extruder in the Rubber Laboratory at the Naval Air Material Center. Chemist C.P. Yarnall (center) and two unidentified men are seen removing material from the extruder and coiling it around a…

Research chemist Stanley Supkis using a distillation apparatus in the Aeromaterials laboratory at the Naval Air Engineering Center (Philadelphia, Pa.).

Fig. 202: Cross-section of the set piece of Fortuna, her body enclosing a single pyrotechnic case (as described in figure 189).

Fig. 204: Outward appearance of fortified castle set piece with diagrams of its inner construction and disposition of pyrotechnics.
Fig. 205: Statue of Mars upon a pedestal for use in public ceremonies of triumph.
Fig.…

Figs. 207-210: Fire crowns.
Fig. 211: Fire hoop.
Figs. 212-215: Pyrotechnic cylinders.
Fig. 216: Wooden bar with iron spikes.
Fig. 217: Fire sack over bar from figure 216.
Fig. 218: Fire sack.
Figs. 219 and 220:…

Fig. 203: Outward appearance of Fortuna set piece.

Fig. 200: Cross-section of the set piece of Bacchus, his body enclosing multiple pyrotechnic cases connected by fuses.

Fig. 201: Outward appearance of Bacchus set piece.

Figs. 132 and 133: Methods to cut a pattern for spherical fireball bags.
Figs. 134 and 135: Manners of sewing spherical fireball bags.
Figs. 136 and 138-144: Fireballs.
Fig. 137: Fireball with crackers.
Fig. 145: Tools…

Fig. 175: Pyrotechnic shield or fire wheel.
Fig. 177: Pyrotechnic dagger.
Fig. 178: Fire sword.
Fig. 179: Fire pole.
Figs. 180, 181, and 183: Fire wheels.
Fig. 182: Iron axle for fire wheels.
Figs. 184-186: Pyrotechnic…

Fig. 152: Wooden ball filled with hand grenades.
Fig. 153: Fireball composed of fireballs.
Fig. 154: Wooden ball filled with fiery rain.
Fig. 155: Military light balls.
Fig. 156: "Death's head" fireball.
Fig. 157:…

Fig. 118: Wooden tampions.
Fig. 119: Grenade with vent and bottom turned into female screws.
Fig. 120: Manner of packing a grenade in a mortar.
Fig. 121: Blind grenade.
Figs. 122-126 and 128: Cannon-fired grenades.
Fig.…

Figs. 102 and 103: Projectile fireballs.
Fig. 104: Mortar for projecting fireballs.
Figs. 105 and 106: Paper crackers.
Figs. 107 and 108: Iron crackers.
Figs. 109-111: Hand grenades.
Fig. 112: Hand grenade launcher.…

Figs. 77-79: Devices to hang sky rockets.
Figs. 80-88: Floating fireballs.

Fig. 34: Technique for choking rocket cases with a turning wooden sheave.
Fig. 35: Tool for choking large rocket cases.
Fig. 36: Tool to form a round cavity in the neck of a rocket case choked with the tool in figure…