The force is proportional to the product of the two masses and inversely proportional to the square of the distance between them. The first test of Newton's theory of gravitation between masses in the laboratory was the Cavendish experiment conducted by the British scientist Henry Cavendish in 1798. It took place 111 years after the publication of Newton's Principia and 71 years after his death.
Tea tree essential oil (Melaleuca alternifolia) is one of the most effective anti-viral oils, which makes it one of the best cold and flu remedies in aromatherapy. A warm bath with tea tree oil, taken when the first symptoms appear, can sometimes ward off the cold or at least reduce its length.
Eucalyptus essential oil deters mosquitoes and other insects, and it works even against fleas on dogs and cats (but never use undiluted essential oils on your pets! Try a more pet-specific option for homemade natural flea repellents). Lavender is another natural mosquito repellent, and it works for other insects too.