WHO Library Cataloguing-in-Publication Data. Bonita, Ruth. Basic epidemiology / R. Bonita, R. Beaglehole, T. KjellstrÃ¶m. 2nd edition. 1.Epidemiology. 2.Manuals. I.Beaglehole, Robert. II.KjellstrÃ¶m, Tord.
Bow, NH is currently using only one area code which is area code 603. In addition to Bow, NH area code information read more about area code 603 details and New Hampshire area codes. Bow, NH is located in Merrimack County and observes the Eastern Time Zone. View our Times by Area Code tool. Select Any New Hampshire City or Town Alphabetically
The bow drill is an ancient form of drilling tool. It commonly was used to make friction fire, and in this function it also was called a fire drill. However, the same principle also was used widely in drilling for purposes of woodworking and dentistry. Bow drill is used to get an ember (left), the ember makes tinder smoke (center), until a fire is lit (right). Whilst a v is most common, other methods to create a cavity to contain the dust whilst it is being ignited can be used.