Flowers for the Women Wearing Veils - Volume I — Page 129
! ! 129 The Third Speech Delivered by Haz rat Mirza Bashir - ud - D in Mahmud Ahmad , Khalifat - ul - Masih II ra La dies ’ Jalsa Hall March 5, 1923 I have previously outlined fifty [ one ] subjects and will now describe the remaining few. Science a nd Geology 52. P hysics: This is one subject within a larger field of study , which in our country is call ed Science. I t can be further divided into subjects, one of which is Physics. This subject discusses the generation of sound, the description of light, heat and cold, liquids etc. It also describes electricity, magnetism, atoms, properties and states of matter, and individual properties of solid, liquid, and gas. Any and all machines invented are due to this knowledge. This field discusses liquids, gas, sound, light, magnetism, atoms, and the composition of matter. I nventions are conceived based upon these studies. For example, railroad engines were created based upon the knowledge of heat energy, how this energy is created, and how it is stopped. It was the knowledge [of physics] which taught that light is created from electricity and how electricity is conducted from one place to another. Additionally, studying this subject unearthed the fact that electricity could travel w ithout cables. No action is wasted. Then there is the study of molecules , which led to the invention of the injection. Thus, machines run based upon the concepts of gas, liquid, and magnetism , all of which are studied within this field and the foundation of so many inventions. O ne aspect of physics is practical application, meaning how to best utilize theoretical knowledge , while another aspect is mechan ical, i. e. , what is the effect of machines. 53. Chemistry: This is the same knowledge which in the past, was called Alchemy. It studies the combination of two elements to