The present invention relates to hydrocarbon extraction method and apparatus therefor. The system features positive displacement pump such as reciprocating pump containing a damping mechanism to dampen out the peaks and valleys in the fluid pressure that is pumped, which is important for preventing cavitation. In at least some embodiments, the server is capable of providing web pages, executable programs andor other information including, for example, information in accordance with an FTP protocol onto the internet for receipt by the terminals. The method further involves producing a master text file by the master server and a slave text file by the slave server. Methods of using the compounds to treat MC4-R associated disorders, such as disorders associated with weight loss, are also provided. The auxiliary layer has a color different from those of the inner and outer covers and has an end surface which is exposed to the outside on the surface of the golf ball within the mark portion.