"Fuligula ferina americana. Red-head. American Pochard. The feathers of the head somewhat full and puffy,…
"Fuligula ferina americana. Red-head. American Pochard. The feathers of the head somewhat full and puffy,…
"Fuligula ferina americana. Red-head. American Pochard. The feathers of the head somewhat full and puffy,…
"Camptolaemus labradorius. Labrador Duck. Pied Duck. Adult male: Bill black with orange at base and…
"Mergus merganser. Merganser. Goosander. Nostrils near middle of bill. Frontal feathers extending acutely…
"Sterna dougalli. Roseate Tern. Paradise Tern. Bill about as long as head or foot, straight, slender,…
This is an early 20th century lady's outfit. It is consists of two pieces, the top is a fitted jacket…
"Ceratorhina monocerata. Unicorn Auk. Horn-bill Auk. Young: Bill like that of adults in winter, lacking…
"a, an inch of trachea, contracted to the utmost, the rings looking like alternating half-rings; b,…
"Very generally, in cranes and swans, the trachea enters the keel of the sternum, which is excavated…
"Bifurcation of trachea, and bronchi, viewed from below; a, pessulus, the bolt-bar, or "bone of divarication";…
"a, b, c, d, inferior laryngeal or syringeal muscles, not well made out in this figure; But typical…
"Synthliborhamphus antiquus. Nipper-nosed Murrelet. Bill somewhat as in Brachyrhamphus, but stouter…
2 parallel horizontal lines with arrows on both ends to show that they extend indefinitely. The top…
A 6 inches diameter protractor to measure angles to half degrees, made of brass or German silver. They…
"Through the center of the space draw a horizontal and a vertical line, measuring on these lines as…
"Draw one and one-half inch square about center of space. Divide AE into four 3/16" spaces, with scale.…
"Draw the diagonals of the square. With the corners of the square as centers and radius of half the…
"At A draw the tangent AD and Chord AB produced. Lay off AC equal to half the chord AB. With center…
"Join A and D. Lay off DF equal to AC-DC. Bisect AF by a perpendicular crossing AC at G and intersecting…
A fire extinguisher is an active fire protection device, easily portable by hand. Handheld extinguishers…
This collapsible magic lantern is an early form of a slide projector, also known as the ancestor of…
The conventional break symbol for drawing a pipe or tubing by cutting the diameter in half.
A representation of the square threaded nut and screw. The left image shows the threaded screw with…
A representation of the square threaded nut and screw. The left image shows the threaded screw with…
An illustration of the hexagonal bolt head showing measurements. The measurement of diameter, D, is…
A problem exercise using a t square and 45 degree triangle to divide the paper into half inch squares.…
An inscribed circle pattern exercise for mechanical drawing. The pattern is drawn by dividing the horizontal…
A mechanical drawing exercise of a circle with curved wavy lines. The image is drawn by dividing horizontal…
An illustration of an oboe double reed. The cane is folded in half and shaped. The bottom is wrapped…
"The indicator consists of a cylinder in which a piston is fitted, a spring, multiplying lever, and…
"As the eccentric turns in the strap, the point O moves in the dotted circle around O', and the point…
"It was during the siege of Methone that Philip had the misfortune to lose on of his eyes. A random…
A greenish-yellow plant with small sweetly fragrant flowers. They are widely spread throughout the eastern…
Also known as Quercus cerris. A greenish-white tree with a dark gray bark. The flower produced is a…
"One standing at O will only see the half of the Sky which is above the circle NESW. The whole sky will…
"The engraving shows a large, powerful man, of giant size and strength, endeavoring to move a large…
"Here is a store of costly wine and meats, / Of which this rich man daily drinks and eats; / But in…
"At a low price these goods this man hath bought, / 'Pay as you go,' so he's been early taught: / By…
"But who are the little boys with the silver badges about the size of a half-dollar on their coats,…
Also known as Picea glauca. A spruce tree native to the northern half of North America.
The flowers of aethionema grandiflorum are a warm rose color and are crowded together. The bush is about…
The flowers of ancectochilus friderici-augusti are usually small and unattractive. The leaves are two…
The petals of antirrhinum asarina was one and a half inches long. The petals are white, sometimes tinged…
Babiana Stricta Rubro-Cyanea is a bulbous plant found in South Africa. The upper half of the perianth…
The flowers of bignonia magnifica range in color from a delicate mauve to a rich purplish-crimson. The…
The flowers of brodiaea coccinea are blood red below with yellowish-green segments. The flowers are…
Browallia elata flowers are deep blue. The stems have many flowers. The shrub grows one and a half feet…
In shield-budding the bark should first have two incisions, a length wise incision one inch long, and…
Caliphruria subedentata has white, funnel shaped flowers. The plant grows one and a half feet high.
Campanula puncata flowers are whitish spotted with red on the inner surface. The stem is simple and…
Campanula thyrsoidea flowers are yellow with a greenish tint. The stem is simple and is covered with…
The flowers of fuchsia apetala are red and pale yellow lobes. The flowers are one and a half inches…
The common name of geranium is crane's bill. The flowers of geranium anemonaefolium are large and purplish…
Gesnera refulgens flowers are a rich, deep red color. The flowers bloom in summer. The plant grows between…
The Naples gourd is also known as the African gourd. This is a large gourd, sometimes one and a half…
The fronds of the gymnogrammee schizophylla fern are one and a half to two feet long. The fronds gracefully…