Sentence:  So we may conceive the coexistence of the infinite number of universal , apparently momentary states of matter , successive one after another in consciousness , but permanent each on its own basic <WSD>phase</WSD> of the progressive frequencies . 
Meaning of the word marked with <WSD> tags:  (physical chemistry) a distinct state of matter in a system; matter that is identical in chemical composition and physical state and separated from other material by the phase boundary