Meteor Plus

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Cadmium, Lead carbonate basic, Meteor Meteor Plus... 

Meteor Plus, Complex inoiganic color pigments, Engelhard Corp. 

The Meteor and Meteor Plus colorants fall into two main classes of stable crystal structures spinels and rutiles. 

Meteor cuid Meteor Plus pigments exhibit the following high performance characteristics ... 

Meteors form when meteoroids enter the atmosphere. The mean orbital velocity of the Earth around the Sun is 29.7 kms-1, so a particle stationary in space will enter the Earth s atmosphere at this velocity. Gravity will further attract the particles up to a maximum of 11 kms-1 (the escape velocity) to make an entry velocity of order 40 kms-1 plus whatever additional velocity the particle may possess. This energy is converted into heat by the drag on the atmosphere, producing temperatures of order 2000 K - the glow seen from a shooting star. The final temperature depends on the properties of the particle, the atmospheric composition and the angle of incidence with the atmosphere. 

Meteoric and surface waters, percolating through the thick layers of thin volcanic material, become always more basic and saline, as they penetrate in depth. This results in a vertical zonation with formation of clays near the surface and then, going downwards, zeolites, from open types (clinoptilolite, chabazite, phillipsite) to narrow-pore (analcimc), and finally alkali-feldspars. Generally, only one or two zeolite species are formed in open systems. A typical example of this type of occurrence is the John Day Formation, Oregon, characterised by fresh glass and clinoptilolite zones, plus sporadic K-feldspar [35]. 

The authors show that the observed excess of molecular nitrogen consists of at least two components similar in magnitude (1) AN2 due to excess air formation, and (2) excess N2 as the product of nitrate reduction. The amount of N2 attributed to denitrification, i.e., excess N2 after the correction for atmospheric N2 (equilibrium plus excess air), depends on the model of excess air formation. The occurrence of excess N2 in anoxic meteoric waters does not necessarily indicate denitrification and may be related to excess air. AN2 is only an indicator for denitrification, if excess air and possible fractionation processes are accounted for. 

DESCARTES, R. Discours de la me thode de bien conduire sa raison et chercher la verite dans les sciences plus la dioptrique, les meteores et la geometric, qui sont des essais de cette me thode. Leyden, 1637. There are several English translations. The text quoted here was translated by ELIZABETH S. HALDANE and G. R. T. ROSS (Chicago, Encyclopaedia Britannica, 1952). 

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