Are you the new owner of a chainsaw or a weekend woodcutter? If so, are you using your chainsaw safely? If you’re at all in doubt, please put the saw down now and register for this class on Saturday, October 17, beginning at 9:30 a.m.,Â at the Arnold Arboretum. In this lecture and demonstration by ISA-certified arborist John DelRosso, Head Arborist of the Arboretum, you will learn the basics of chainsaw use. John will talk about essential safety equipment and maintenance requirements. He will demonstrate sharpening and bar tensioning and discuss limbing and felling techniques, including tension cuts. Bring your saw, along with ear protection, for the maintenance discussion. Bring a lunch, too, and dress for the outdoors.Â C’mon, haven’t you all secretly longed to work with a big, loud power tool? Fee $60 Arboretum member, $75 nonmember.Â To register, log on to www.arboretum.harvard.edu. The awesome photo below was taken by Jason Levesque, and can be viewed, along with other fabulous and quirky shots, on xstuntkidx’s photostream on Flickr.com.