Go Sit In A Cave Or...
Get A Pentex Ionizer.

In ancient textbooks on yoga, that venerable mystic discipline of the East, it's suggested that a student wishing to perfect his body and mind through breathing exercises should practice near a waterfall, in a cave or (best of all) in a cave under a waterfall. While it's obvious that pure air is better than polluted air, the proposition that there's more energy in one kind of pure air than in another, would to many people, seem specious, if not superstitious. But Science over the past 20 years has proved that some air does give us more energy than other air.

A QUICK CRAMMER ON IONS:

An ion is any atom or molecule that has gained or lost an electron. (a teeny-weeny charge of energy, for those who slept through eighth-grade science). A negative air ion is an atom or molecule that has gained an electron and a positive air ion is a molecule that has lost an electron. Nature produces both positive and negative ions in abundance, but when it comes to feeling good, it's the negative ions that are important. How are negative ions produced? Well, the best generator is lightning, followed by ocean surf and waterfalls. Negative ions are also abundant in mountains and forests (all plants give off some ions). You'll notice that the highest negative ion concentration are in natural environments and if you suspect that the air in your air conditioned, or heated office isn't so good, you're right.

That's because of one or more of the following factors:

• The surrounding grounded steel structure draws off any negative ions.
• Central heating or air conditioning actually strips the air of negative ions.
• Synthetics used in carpets, draperies and upholstery carry a high positive charge and absorb negative ions. Let's categorize the effects of various ion counts in the air you breathe.

	PLACE OR CONDITION IONS PER C.C. Hermetically sealed steel-structure office building with central air conditioning and heating. 0-250 Inside and airplane 20-250 Smoky indoor air 0-250 Normal indoor air 250-500 Urban air in average industrial city 250-750 Country air 1000-2000 Mountain air 1000-5000 Ocean-surf air 2,500-1,000 Inside caves 5000-20,000 Waterfalls 25,000-100,000

IONS PER C.C. EFFECT
50,000+	Pure air; very stimulating and relaxing; germs cannot live in this air.
5000	Exceptionally fresh, clean and invigorating air.
1000-5000	Generally the range found for "country fresh air" The minimum level one should sleep, work and live in.
500-1000	Normal air found indoors where pollution is low and the building has open windows and few synthetics.
0-100	Dead Air, oppressive, difficulty of concentration; viruses and germs can flourish counter-productive when working for any length of time.