influence on the growth of Calder's art. When Calder first heard of these claims, he immediately admonished his critics. "I have never been and never will be a product of anything more than myself. My art is my own, why bother stating something about my art that isn’t true?" One of Calder's first mobiles, Mobile (1938) was the work that "proved" to many art historians that Man Ray had an obvious influence on Calder's style. Both Shade and Mobile have a single string attached to a wall or a structure that keeps it in the air. The two works have a crinkled feature that vibrates when air passes through it. Regardless of the obvious similarities, Calder's style of mobiles created two types that are now referred to as the standard in kinetic art. There are object-mobiles and suspended mobiles. Object mobiles on supports come in a wide range of shapes and sizes and can move in any way. Suspended mobiles were first made with colored glass and small wooden objects that hung on long threads. Object mobiles were a part of Calder's emerging style of mobiles that were originally stationary sculptures. It can be argued, based on their similar shape and stance, that Calder's earliest object mobiles have very little to do with kinetic art or moving art. By the 1960s, most art critics believed that Calder had perfected the style of object mobiles in such creations as the Cat Mobile (1966). In this piece, Calder allows the cat's head and its tail to be subject to random motion, but its body is stationary. Calder did not start the trend in suspended mobiles, but he was the artist that became recognized for his apparent originality in mobile construction. One of his earliest suspended mobiles, McCausland Mobile (1933), is different from many other contemporary mobiles simply because of the shapes of the two objects. Most mobile artists such as Rodchenko and Tatlin would never have thought to use such shapes because they didn't seem malleable or even remotely aerodynamic. Despite the fact that Calder did not divulge most of the methods he used when creating his work, he admitted that he used mathematical relationships to make them. He only said that he created a balanced mobile by using direct variation proportions of weight and distance. Calder's formulas changed with every new mobile he made, so other artists could never precisely imitate