✔ 100% Money-Back Guarantee on Eligible Items
✔ Prices Displayed in Your Local Currency
✔ Final Price = No Surprise Import Fees
✔ Complimentary Insured Worldwide Shipping on Qualifying Orders
✔ Select Collector & Specialty Pieces May Require Secured Delivery Handling
by Karl Riley (Author)
A link between power line magnetic fields and childhood leukemia was revealed in a 1979 health study. More studies in the U.S. and Europe supported these findings, including links to other diseases. But when careful measurements were made in schools, offices and residences it was found that most high magnetic fields in buildings were caused by certain common wiring errors, as well as by electric currents on water pipes due to grounding practices. Karl Riley pioneered a successful method of tracing high magnetic fields to the site of the error. A simple correction clears the field. Though his clients in 17 states may see him as an electrical Sherlock Holmes, he follows a simple, logical measurement sequence which leads him inevitably to the spot where the error was made. Correction is simple and obvious. His entire diagnostic method is spelled out in this book, for the use of electricians or technically inclined home owners.
Author Biography
Karl Riley's breakthrough discoveries as to the causes of high magnetic fields in buildings were helped by his not being either an electrician or an electrical engineer. A fresh viewpoint was needed. He had just retired from science teaching on Marthas Vineyard (MA, Columbia T.C.) when a neighbor asked for help when her guests were getting electric shocks from her outdoor shower. His investigation, using a simple voltmeter, showed the utility company where to dig. They uncovered a sliced hot conductor, cut earlier by a plumber's back hoe. Thus Karl's interest was directed to electrical problems just as Paul Brodeur's book, Currents of Death, focused interest on the health effects of power line magnetic fields and the resulting controversies and denials. He began attending national health conferences focusing on this link, sponsored by the Department of Energy and the utilities. He soon realized this link was real, and focused on designing a more economical magnetic field meter for general use. This he achieved with superior accuracy, and sold under the company name of Magnetic Sciences International. His gaussmeters sold to utilities, electricians and to home owners. They went out to many countries around the world. At this time he moved to California and soon became busy as a consultant and magnetic field surveyor for home owners, businesses, schools, and for the California Health Services, which sponsored many health effects studies. He was chosen to do the discovery phase of the large CA school magnetic field study, uncovering the wiring errors in the Pilot study of 5 schools. Following this he received a CA grant to produce a video for electricians showing them how to trace magnetic fields to their source in wiring errors (Now a DVD). He responded to requests to find field sources in buildings in 17 states. It was clear that this was a new challenge for electricians as well as electrical engineers, so a book was needed, and Karl wrote the first edition in 1995 while attending a health conference in Copenhagen. Though the basic methods have not needed improvement, additional info on grounding and instrumentation were added in 2005 and 2012 revisions. His book was recognized as important by Mike Holt, author of instructional books for electricians, and Karl was invited to be a moderator on Mike's Code Forum for electricians. Karl is semi-retired but still responds to calls for consultations.
- In stock, ready to ship
- ✔ Authenticity Guaranteed — Verified Designer Goods
- ✔ Sourced from Authorized European/U.S. Luxury Distributors
- ✔ Secure Checkout — SSL Encrypted Payments
- ✔ Fast Global Delivery — 3–11 Business Days
- ✔ Easy Returns on Eligible Items
- ✔ 100% Money-Back Guarantee — Full Refund if Not Satisfied
AUTHENTICITY GUARANTEED
Reserved for you — complete your purchase to secure this piece.
OFFICIALLY AUTHORIZED RESELLER
Discover Officially Authorized Authentic Items at STORE7994.com - Certificates Available on Request!
Independently verified for store quality and customer safety.
Trust score: 91/100
All designer items offered by STORE 7994 are sourced from trusted luxury distributors and verified through independent authentication services.
Learn how STORE 7994 authenticates luxury items
Guaranteed Authentic — Includes Brand Documentation & Third-Party Verification Options.
Shipping information
- Free Shipping* on all orders over $300 USD to most countries* Estimated delivery: 2-5 business days Mon-Sat to U.S., CA, EU etc.
- Tracking available: DHL Express
- Store 7994 Shipping policy
- Global delivery in 3–9 business days (location dependent).
- Free Worldwide Shipping $300+. International duties & VAT are calculated by destination country and may be collected upon delivery. UK orders are subject to 20% import VAT upon delivery.

Our innovation isn’t just in the brands we carry — it’s in the way we connect them. From our automation engine that keeps collections globally updated to our commitment to authenticity-first presentation, STORE 7994 exists where timeless design meets modern precision.
Every product we offer is:
Elevated · Intentional · Exclusive · Authentic
STORE 7994 is an authorized reseller of luxury fashion houses. Certificates and proof of authenticity are available to brand owners and partners upon request.
Returns & Refunds
We want you to shop with confidence at STORE 7994. If your purchase does not meet expectations, eligible items may be returned under the conditions below.
Return Eligibility
Items must be unused, unworn, and in original condition with all tags, packaging, and accessories included. Items showing any signs of wear or damage will not be accepted.
Return Window
Return requests must be made within 14 days of delivery.
Return Shipping
Customers are responsible for return shipping costs unless the item is defective, damaged, or incorrect.
Luxury Items
Items valued over $1,000 may be subject to a 7% restocking fee upon approved return.
Non-Returnable Items
For hygiene and product integrity reasons, the following items are final sale once opened or used:
• Underwear
• Fragrances
• Any worn or used items
Made-to-Order Items
Custom-designed products, including STORE 7994 hoodies, are made exclusively for each customer and are final sale. These items are not eligible for return or exchange unless defective or incorrect.
If you receive a defective or incorrect item, please contact us and we will make it right.
International Shipping & Duties
Many of our products ship directly from trusted international partners. Any applicable customs duties or import taxes are calculated at checkout and are non-refundable, even if the item is returned.
Returns & Associated Fees
All approved returns are subject to a $24 return processing fee. For international orders, duties, taxes, and return fees will be deducted from the original payment.
Shipping Policy
Complimentary shipping is offered on orders over $300. Orders below this threshold are subject to standard shipping rates at checkout.
>