Operating Systems Installed: * Debian GNU/Linux 2.1 4 CD Set ($20 from www.chguy.net; price includes taxes, shipping, and a $3 donation to FSF). 2 CDs are binaries, 2 CDs</p> complete source code; * Windows 98 Second Edition Upgrade Version ($136 through Megadepot.com, price does not include taxes/shipping). Surprisingly, no source code is included. -- Bill Stilwell, http://linuxtoday.com/stories/8794.html
* Culus thinks we should go to trade shows and see how many people we can kill by throwing debian cds at them
Proposed Additions to the PDP-11 Instruction Set: BBW Branch Both Ways BEW Branch Either Way BBBF Branch on Bit Bucket Full BH Branch and Hang BMR Branch Multiple Registers BOB Branch On Bug BPO Branch on Power Off BST Backspace and Stretch Tape
CLBR Clobber Register
CLBRI Clobber Register Immediately
CM Circulate Memory
CMFRM Come From -- essential for truly structured programming
CPPR Crumple Printer Paper and Rip
CRN Convert to Roman Numerals
Double *sigh*. _04 is going onto thousands of CDs even as we speak, so to speak. -- Larry Wall in <199710221718.KAA24299@wall.org>
Cadmium sulphide, CdS, occurs naturally as greenockite (_q.v._), and can be artificially prepared by passing sulphuretted hydrogen through acid solutions of soluble cadmium salts, when it is precipitated as a pale yellow amorphous solid. It is used as a pigment (cadmium yellow), for it retains its colour in an atmosphere containing sulphuretted hydrogen; it melts at a white heat, and on cooling solidifies to a lemon-yellow micaceous mass. Entry: CADMIUM
GREENOCKITE, a rare mineral composed of cadmium sulphide, CdS, occurring as small, brilliant, honey-yellow crystals or as a canary-yellow powder. Crystals are hexagonal with hemimorphic development, being differently terminated at the two ends. The faces of the hexagonal prism and of the numerous hexagonal pyramids are deeply striated horizontally. The crystals are translucent to transparent, and have an adamantine to resinous lustre; hardness 3-3½; specific gravity 4.9. Crystals have been found only in Scotland, at one or two places in the neighbourhood of Glasgow, where they occur singly on prehnite in the amygdaloidal cavities of basaltic igneous rocks--a rather unusual mode of occurrence for a metallic sulphide. The first, and largest crystal (about ½ in. across) was found, about the year 1810, in the dolerite quarry at Bowling in Dumbartonshire, but this was thought to be blende. A larger number of crystals, but of smaller size, were found in 1840 during the cutting of the Bishopton tunnel on the Glasgow & Greenock railway; they were detected by Lord Greenock, afterwards the 2nd earl of Cathcart, after whom the mineral was named. A third locality is the Boyleston quarry near Barrhead. At all other localities--Przibram in Bohemia, Laurion in Greece, Joplin in Missouri, &c.--the mineral is represented only as a powder dusted over the surface of zinc minerals, especially blende and calamine, which contain a small amount of cadmium replacing zinc. Entry: GREENOCKITE
which integrated gives ydx - xdy = Cds. This again may be put in the form r sin a = C, where a is the azimuth of the geodetic at any point--the angle between its direction and that of the meridian--and r the distance of the point from the axis of revolution. Entry: A
On the other hand, substances which are chemically quite distinct may exhibit similarity of crystalline form. For example, the minerals iodyrite (AgI), greenockite (CdS), and zincite (ZnO) are practically identical in crystalline form; calcite (CaCO3) and sodium nitrate (NaNO3); celestite (SrSO)4 and marcasite (FeS2); epidote and azurite; and many others, some of which are no doubt only accidental coincidences. Such substances are said to be "homoeomorphous" (Gr. [Greek: homoios], like, and [Greek: morphê], form). Entry: III
Iodyrite (AgI), greenockite (CdS), wurtzite (ZnS) and zincite (ZnO) are often placed in this class, but they more probably belong to the hemimorphic-hemihedral class of the rhombohedral division of this system. Entry: DIHEXAGONAL
Cadmium sulphate, CdSO_4, is known in several hydrated forms; being deposited, on spontaneous evaporation of a concentrated aqueous solution, in the form of large monosymmetric crystals of composition 3CdSO_4·8H_2O, whilst a boiling saturated solution, to which concentrated sulphuric acid has been added, deposits crystals of composition CdSO_4·H_2O. It is largely used for the purpose of making standard electric cells, such for example as the Weston cell. Entry: CADMIUM
Fig. 3 represents an imaginary indicator diagram for a steam-engine, taken from one of Watt's patents. Steam is admitted to the cylinder when the piston is at the beginning of its stroke, at S. ST represents the length of the stroke or the limit of horizontal movement of the paper on which the diagram is drawn. The indicating pencil rises to the point A, representing the absolute pressure of 60 lb. per sq. in. As the piston moves outwards the pencil traces the horizontal line AB, the pressure remaining constant till the point B is reached, at which connexion to the boiler is cut off. The work done so far is represented by the area of the rectangle ABSF, namely AS × SF, multiplied by the area of the piston in sq. in. The result is in foot-pounds if the fraction of the stroke SF is taken in feet. After cut-off at B the steam expands under diminishing pressure, and the pencil falls gradually from B to C, following the steam pressure until the exhaust valve opens at the end of the stroke. The pressure then falls rapidly to that of the condenser, which for an ideal case may be taken as zero, following Watt. The work done during expansion is found by dividing the remainder of the stroke FT into a number of equal parts (say 8, Watt takes 20) and measuring the pressure at the points 1, 2, 3, 4, &c., corresponding to the middle of each. We thus obtain a number of small rectangles, the sum of which is evidently very nearly equal to the whole area BCTF under the expansion curve, or to the remainder of the stroke FT multiplied by the average or mean value of the pressure. The whole work done in the forward stroke is represented by the area ABCTSA, or by the average value of the pressure P over the whole stroke multiplied by the stroke L. This area must be multiplied by the area of the piston A in sq. in. as before, to get the work done per stroke in foot-pounds, which is PLA. If the engine repeats this cycle N times per minute, the work done per minute is PLAN foot-pounds, which is reduced to horse-power by dividing by 33,000. If the steam is ejected by the piston at atmospheric pressure (15 lb. per sq. in.) instead of being condensed at zero pressure, the area CDST under the atmospheric line CD, representing work done against back-pressure on the return stroke must be subtracted. If the engine repeats the same cycle or series of operations continuously, the indicator diagram will be a closed curve, and the nett work done per cycle will be represented by the included area, whatever the form of the curve. Entry: 7