"Hold a lamp reflector or other large concave mirror directly facing the sun, so as to bring the rays…
"Rotate the disk slowly, blowing meanwhile through a tube of about 3/16 inch bore, the nozzle of the…
"Hold a vibrating tuning fork over the mouth of a cylindrical jar about 10 or 18 inches deep, and notive…
"About two feet away from an air thermometer, place an inverted flower pot. Midway between the two,…
"Suspend two egg-shell conductors as shown. Be sure that the shells are in contact. Bring an electrified…
On the right is a normal sized chest and on the left is chest as it is in one that has been girt round…
Leaves - simple; alternate; edge entire. Outline - oval or reverse egg-shape. Apex - pointed. Base -…
Leaves - simple; alternate (and in alternate bunches); edge unevenly sharp-toothed (with five to nine…
Leaves - simple; alternate; edge sharply and unequally toothed (sometimes with quite deep and sharp…
Leaves - simple; alternate; edge sharply and often doubly toothed. Outline - oval or egg-shaped, or…
Leaves - simple; alternate; edge lobed (lobes entire). Outline - rounded. Apex - cut almost squarely…
Leaves - simple; alternate; edge lobed; (edge of the lobes entire or sometimes coarsely notched and…
Leaves - simple; alternate; lobed (the edge of the lobes entire, or of the larger ones sometimes wavy).…
Leaves - simple; opposite; edge entire. Outline - egg-shape, or often broad oval, or reverse egg-shape.…
Leaves - simple; opposite; edge lobed, with the lobes very sparingly and coarsely sharp-toothed or the…
Leaves - simple; opposite; edge lobed, with the lobes irregularly sharp-toothed and notched. Outline…
Parallel lines are drawn by using a triangle in combination with a T-square. To draw a line parallel…
In changing the compass from a small to large radius, hold the legs together with one hand and spin…
Do not hold the pen over the drawing while filing. Keep the blades parallel to the direction of the…
To make a blueprint, place the tracing in a blueprint frame with the inked side next to the glass and…
"If a compass is not available, a watch can be used. Hold the watch flat in the hand and with the hour…
"Optical section of a Radiolarian. a, Nucleus; b, wall of central capsule; c, siliceous shell within…
"Seed of bloodroot with caruncle or crest, which serves as a handle for ants to hold on to. Ant ready…
Visualizing measurement with different containers that hold one pint and one quart.
The Alamo in San Antonio, Texas where the battle occurred during the war for Texan independence.
The modern decorative easel is a sloping frame with three or four legs. The front and rear are often…
In changing the compass from a small to large radius, hold the legs together with one hand and spin…
Amole has a cluster of thick spiny-margined leaves, from which arises a stem an inch or two in diameter,…
"The Harris pan has the same general form and construction as the foregoing, except that the partitions…
Also known as the Castle of St. Angelo. A castle is a defensive structure seen as one of the main symbols…
An illustration of an elderly man holding his cane in one hand and his hat in the other.
The town was granted its Market Charter in 1214 by King John and continues to hold a market to this…
The Alamo, originally known as Mission San Antonio de Valero, is a former Roman Catholic mission and…
Millard Fillmore (January 7, 1800 – March 8, 1874) was the thirteenth President of the United…
Anne (6 February 1665 – 1 August 1714) became Queen of England, Scotland and Ireland on 8 March…
Order given to stop hostilities on the battlefield. Soldiers stop shooting their weapons when this signal…
Samuel Houston (March 2, 1793 - July 26, 1863) was a 19th century American statesman, politician, and…
Atotarho is a historical figure for whom there is almost no historical record. Oral tradition stories…
Order given to troops instructing them to stop firing. Weapons are held, locked and loaded so that they…
The clamp has two horizontal arms at the side, the lower arm carrying a screw that, by means of the…
A saltcellar is a small, sometimes decorated bowl used to hold salt and is placed on the table.
A bench-shears is a tool with two short, stout blades and very long handles, one of them being fitted…
The Texas Ranger Division, commonly called the Texas Rangers, is a law enforcement agency with statewide…
The Battle of the Alamo was fought in February and March 1836 in San Antonio, Texas. The conflict, a…
The Texas State Capitol, located in Austin, Texas, is the fourth building to serve as the seat of Texas…
Orgyia leucostigma, the White-marked tussock moth, is a moth in the family Lymantriidae. The caterpillar…