The Great Lakes Ships of Frank E. Kirby: America’s Greatest Naval Architect,” by Richard Gebhart, Michigan State University Press, May 2026, 231 pages, $59.95 (Hardcover), $29.10 (Paperback), $29.95 (E-book)

From the 1870s through the 1890s most of the world’s ships not built in British shipyards were built on the North American Great Lakes, a vast interconnected yet isolated inland sea system. Of these Lakes vessels built during that period and for the first two decades of the 20th century, many, including the best designs came from the mind of naval architect Frank E. Kirby.

“The Great Lakes Ships of Frank E. Kirby: America’s Greatest Naval Architect,” by Richard Gebhart, is a biography of the man and a history of his ships. It charts his career, and follows the course of the shipyards he ran and the ships he built.

If you have Cisco 9300 model Ethernet switches and haven’t checked their OS versions lately, you should probably do that. Early releases of Cisco’s IOS version 17.x have an issue with flooding ports when a topology change is detected.

Topology changes like bringing a port up or down could cause flooding. When a port being used for WheatNet IP is flooded, the device connected to that port will most likely miss one or more network packets (potentially hundreds), resulting in loss of control signals and/or audio issues (including but not limited to distortion or dropouts).

Every port in your system should have the no ip igmp snooping tcn flood command applied. But even if this command shows up in your switch configuration, it is ignored in some versions of the Cisco operating system.

View system information and VM configuration details

The VBoxManage list subcommands enable you to obtain information about the Oracle VirtualBox software, the VMs and associated services that you create.

1. Place the mini-marshmallows in the dish one layer thick.
2. If your microwave has a rotating platform, remove it. We don’t want the dish to rotate.
3. Put the dish in the microwave for 10 seconds.
4. When you remove the dish, you’ll notice only certain parts are melted. (Time may depend on the microwave – if all or none of your marshmallows melted, adjust the time.)
5. Measure the distance between melted marshmallows using your ruler. Measure in centimeters. This is half the wavelength of a microwave.
6. Look for a sticker on your microwave that tells you its frequency in Hertz (Hz). Most microwaves are around 2450 MHz. Note: MHz = 10^6 Hz
7. Use the following equation to find the speed of light: Speed of light = 2 x (distance between melted spots) x (frequency of microwave)
8. The actual speed of light is 3.00 x 10^10 cm/s. How close were you?