Couplers uniform

Early in the development of the railroad industry, there were few uniform equipment standards. The first significant federal safety regulation was the Safety Appliance Act of 1893, which required the use of the Westinghouse Brake and Janney Couplers. Other federal legislation was passed in the early 1900s. Among the contributions of those laws were to ... 

Fig. 28-2 Examples of (a) a tapered coupler of core index and core radii Pi (z) and P2 (z) in a uniform cladding of index n, and (b) two identical fibers.

Uses Solubilizer, coupler, emollient facilitates dispersion in antiperspirant sticks to help release the active and provide uniformity nonstaining improves spreading, reduces tackiness in creams/lotions conditioner in colognes, shaving and hair... 

---