jnited tat This invention rel-ates to linear highly polymeric polyamides which can be formed by the condensation of 1,3- or 1,4-cyclohexanebis(methylamine) with one or more bifunctional polyamide-forming compounds. More particularly, this invention relates to those polyamides wherein the polyamide-forming compound is a bifunctional carboxy compound containing from 1 to 20 carbon atoms. Advantageously, the bifunctional carboxy compounds include straight-chain aliphatic dicarboxylic acids containing from 6 to 12 carbon atoms, isomers of such compounds Which contain one or two methyl or ethyl radicals attached to the principal carbon chain, the various isomers of cyclohexanedicarboxylic acid, the various isomers of benzenedicarboxylic acid and other aromatic and cycloaliphatic dicarboxylic acids. The especially advantageous polyamides of this invention can be melt-extruded without substantial decomposition at temperatures above 250 C. and in some instances even as high as 350 C. or higher. Moreover, the polyamides have other excellent physical and chemical characteristics such as resistance to acidic or basic hydrolysis, low degree of shrinkage in boiling water and hot air, excellent tensile modulus, etc. These polyamides can be advantageously employed in the manufacture of fibers, yarns, fabrics, film, extruded objects, supports for photographic emulsions, molding compositions, coating compositions, electricalinsulation, etc. The well-known polyamide which has enjoyed commercial success for a good number of years because of its excellent properties is commonly referred to as nylon 66 and is derived from the condensation of adipic acid and hexamethylenediarnine. A closely related polyamide which has been commercially produced is referred to as 6-nylon which is derived from the self-condensation of epsilon-caprolactam. The development of nylon 66 and related polyamides is based upon work done by Carothers and those who have followed him. Although the patents which have been issued disclose numerous alternative diarnines to hexamethylenediamine in the preparation of polyamides, none have found commercial acceptance to any significant degree. In Carothers work there is disclosed the employment of diamines such as para-xylenediamine. The poiyamide produced from this particular diamine melts at about 268 C. which is approximately the same melting point possessed by nylon 66 which melts at about 264 C. Polyamides derived by condensing cyclohexane-l,4-diamine have been described in the patented art as being useful in the preparation of certain polyamides which are not considered to be in the same class of general excellence as nylon 66 insofar as concerns an overall combination of properties. From this background of prior art pertaining to this general field of polyamides, there was nothing which would suggest that 1,4-cyclohexanebis(methylamine) could be employed to produce a polyamidewhich would represent an outstanding improvement over those prop- 3,012,994 Patented Dec. 12, 1961 cyclohexanebis(methylamine) can be condensed with adipic acid and other dicarboxy compounds to produce polyamides of general textile utility melting at 250 to 350 C. was indeed most unexpected. Even more unexpected was the discovery that it was possible to melt-extrude by the usual melt-spinning technique a fiber from a polyamide derived from 1,4-cyclohexanebis- (methylamine) and an acid such as adipic acid at from about 335 to about 350 C. without significant thermal decomposition. Thus, the thermal properties of the polyamides of this invention are most outstanding. The polyamide of 1,4-cyclohexanebis(methylamine) derived from essentially trans material condensed with adipic acid has a crystalline melting point of 335-340 C. which is exceptionally high to a quite surprising degree in view of the fact that it is formed from a diamine which contains 8 carbon atoms. In contrast, nylon 86 formed by the condensation of octamethylenediamine and adipic acid melts at only 235 C. and even nylon 66 melts at only 264 C. This further emphasizes the unexpectedly high melting point which was an unexpected characteristic of the polyamides of the present invention. Although the prior art has disclosed many polyamides which melt at temperatures approximately equivalent to the melting point of nylon 66, many of those which might appear useful have been found to undergo serious decomposition at the temperatures required for meltspinning the polyamide. Thus, the fibers produced contained decomposition products including bubbles which erties possessed by nylon 66. The discovery that 1,4- 7 rendered the fibers useless for practical purposes. . The polyamide of para-xylene-a,ot-diamine and sebacic acid melts at about 268 C. whereas the polyamide of the present invention derived from 1,4-cyclohexanebis(methylamine) employing essentially trans material condensed with sebacic acid melts at about 300 C. This in itself is most unexpected since the elimination of the unsaturation in the benezene ring of the known polyamide would ordinarily be assumed to adversely affect the melting point (see Fibers for Synthetic Polymers, by Rowland Hill published in l53 by the Elsevier Publishing Company, especially page 317). Thus, by eliminating the unsaturation of the benzene ring, the melting point of the resulting polyamides is raised by an increment of about 30 C. which is quite unexpected since it is the benzene ring which is usually assumed to raise the melting point of polymers. In addition to the surprisingly high thermal stability of the polyamides derived from 1,3- and 1,4-cyclohexanebis(methylamine), these poly-amides were also found to possess numerous other unexpectedly superior properties when compared to nylon 66. It is an object of this invention to provide highly polymeric linear polyamides derived from the condensation of 1,3- and/or 1,4-cyclohexanebis(methylamine) with a bitunctional compound capable of forming a polyamide.