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The ptLrticiilar kind of surfece integration referred to is that which gives the value, at a single point inside the surface, of the integral of an equatioll which holds throughout the volume inside the surface. When, by symmetry, it is only necessary to apply it to a line lying in the surface it will be called 1 1 "crinietQr intcgratioii," riot c~intutir integration rid thc word I ' contour " i., ~c>t.r\-ctl tlJ 11lci111 CI liiic along nhicli A function of pobition is cunstniit. \-oL. SSIII. Fdoi:10.1088/1478-7814/23/1/308 fatcat:ow244ccmsvf3fk4j5ve74tado4