Gold leaf

Buchblnder-gold, n. bookbinder s gold, leaf gold, -kleister, m. bookbinder s paste, -leim, m. bookbinder s glue, -pappe, /. binder s board. 

Fabrik-betrieb, m. factory n ianagement or practice. -direktor, m. works manager, -gold, n. (strong) gold leaf, -laboratorium,... 

Gold is the most ductile element. An amount of 1 g of gold can be stretched into a 24-km-long fine wire (actually, a thread). It can also be rolled (or beaten) into 100-nm-thick gold leaf. It then looks blue green in color, and red when light is shone through it. 

The gold-leaf electroscope has been widely used in the past to study ionizing radiation. 

The gold-leaf electroscope has been widely used in the past to study ionizing radiation. The first measurement of the properties of ionizing radiation was accomplished with this instrument. A microscope containing a graduated scale in the eyepiece is used to observe the gold leaf. 

The newest electroscope utilizes a quartz fiber and has many advantages over the gold-leaf type. It is portable, less dependent on position, much smaller in size, and more sensitive. The capacity of the quartz fiber electroscope is about 0.2 pico-farads, and its voltage sensitivity is about one volt per division on the scale. The sensitive element is a fine gold plated quartz fiber mounted on a parallel metal support. Figure 22 illustrates a quartz fiber electroscope. 

Uses Solvent for celluloid, cellulose acetate, fats, oils, waxes, nitrocellulose and resins wood preservatives rayon and artificial leather imitation gold leaf extraction of resins and waxes in antifreeze mixtures and hydraulic fluids laboratory reagent preservative for animal tissue dyeing mixtures stripping agent for textiles. 

In some cases it has been found that the maximum on saturation adsorption of a solute from a solution corresponds to the formation of an adsorption layer one molecule thick. Thus Euler Zeit. Elehtrochem. xxviii. 446,1922) found that a maximum adsorption of silver ions by silver and gold leaf was attained in a 0 03 A solution. It was found that 5 5 and 8 5 to 9 mgm. of silver ions were adsorbed by a square metre of metallic silver and gold respectively, such a surface concentration is practically unimolecular. The adsorption of silver ions by silver bromide (K. Fajans, Zeit Phys. Ohem. cv. 256, 1928) was found on the other hand to be not complete, for only every fourth bromide ion in a silver bromide surface was found to adsorb a silver ion. Similar conclusions as to the unimolecular character of the adsorbed film in the case of chemical charcoal as an adsorbing agent for fatty and amino acids may be drawn from the data of Foder and Schonfeld Koll. Zeit xxxi. 76, 1922). 

Figure 4. Plot from reference (27) of the distribution of deflections of particles that have passed through zero, one, and two sheets of gold leaf...

Till at last came a man with gold-leaf and tin cart,... 

Electroscope. An apparatus for detecting electrical charges consists in its simplest form of two strips of gold-leaf attached to an insulated conductor suspended from the stopper of a glass container (See Fig on p 300 of Ref 1), When desired to determine the potential of an electrostatic charge, a so-called measuring electroscope" is used. 

It consists of an insulated gold-leaf mounted in a closed case having an adjustable insulated plate which can be rotated so that an electrostatic and gravitational balance is established. The position of the leaf is read in a low focus microscope (See Fig on p 301 of Ref 1)... 

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